diff --git a/kos/include/bits/crt/mallinfo.h b/kos/include/bits/crt/mallinfo.h
index 2f67816037..582bf20641 100644
--- a/kos/include/bits/crt/mallinfo.h
+++ b/kos/include/bits/crt/mallinfo.h
@@ -24,6 +24,11 @@
 
 #include <hybrid/typecore.h>
 
+#undef _MALLINFO_MATCHES_MALLINFO2
+#if __SIZEOF_INT__ == __SIZEOF_SIZE_T__
+#define _MALLINFO_MATCHES_MALLINFO2
+#endif /* __SIZEOF_INT__ == __SIZEOF_SIZE_T__ */
+
 #ifdef __CC__
 __DECL_BEGIN
 
diff --git a/kos/include/kos/coredump.h b/kos/include/kos/coredump.h
index 3bcef2e62c..c41480e5bb 100644
--- a/kos/include/kos/coredump.h
+++ b/kos/include/kos/coredump.h
@@ -28,7 +28,7 @@
 
 
 /* Coredump message string limits.
- * WARNING: These values as used as alloca() limits, so don't  set
+ * WARNING: These values are used as alloca() limits, so don't set
  *          them too high, or else user-space may be able to cause
  *          a kernel-space stack overflow... */
 #define COREDUMP_ASSERT_EXPR_MAXLEN 512  /* ci_assert.ca_expr */
diff --git a/kos/misc/build/autoconfig.dee b/kos/misc/build/autoconfig.dee
index 91f69f84b3..95321e03fb 100644
--- a/kos/misc/build/autoconfig.dee
+++ b/kos/misc/build/autoconfig.dee
@@ -29,8 +29,8 @@ function getPreviousBuildConfiguration(rootDir: string, targetName: string | non
 	local resultTimestamp = none;
 	local resultTargetName = targetName;
 	if (targetName is none) {
-		/* Figure out `targetName' was enumerating symlinks in "{rootDir}/bin"
-		 * and  picking whichever has the most-recent last-modified timestamp. */
+		/* Figure out `targetName' by enumerating symlinks in "{rootDir}/bin"
+		 * and picking whichever has the most-recent last-modified timestamp. */
 		local mostRecentTargets = [];
 		for (local ent: posix.opendir(rootDir + "bin")) {
 			if (ent.d_type != posix.DT_LNK)
@@ -114,7 +114,7 @@ function getMiOptionsBuildConfig(rootDir: string): (Bytes, Bytes) | none {
 @@Try to automatically determine the target/config for which to build
 @@This function is used when you invoke `magic.dee` without supplying
 @@a `--target=` or `--config=` option. It is also used by `make` when
-@@needing (buf missing) a `TARGET` or `CONFIG` argument.
+@@needing (but missing) a `TARGET` or `CONFIG` argument.
 @@
 @@The actual behavior of this function is not guarantied, but it tries
 @@to figure out the target/configuration which KOS has last been built
diff --git a/kos/src/kernel/core/memory/malloc-impl.c.inl b/kos/src/kernel/core/memory/malloc-impl.c.inl
index 0aea48be9e..64e0c62d1c 100644
--- a/kos/src/kernel/core/memory/malloc-impl.c.inl
+++ b/kos/src/kernel/core/memory/malloc-impl.c.inl
@@ -70,6 +70,7 @@ LOCAL_NOTHROW(KCALL LOCAL_untraced_kmalloc_noslab)(size_t n_bytes, gfp_t flags)
 	assert(heapptr_getsiz(hptr) >= alloc_size);
 	result = (struct mptr *)heapptr_getptr(hptr);
 	mptr_init(result, heapptr_getsiz(hptr), flags & __GFP_HEAPMASK);
+	mptr_assert_paranoid(result);
 	return mptr_user(result);
 LOCAL_IF_NX_ELSE(err:, err_overflow:)
 	LOCAL_IF_NX_ELSE(return NULL, THROW(E_BADALLOC_INSUFFICIENT_HEAP_MEMORY, n_bytes));
@@ -80,21 +81,20 @@ LOCAL_IF_NX_ELSE(err:, err_overflow:)
 #define untraced_kmalloc_noslab     untraced_kmalloc
 #endif /* !... */
 
+#ifdef CONFIG_HAVE_KERNEL_SLAB_ALLOCATORS
 INTERN ATTR_BLOCKLIKE_GFP(flags) ATTR_MALLOC WUNUSED VIRT void *
 LOCAL_NOTHROW(KCALL LOCAL_untraced_kmalloc)(size_t n_bytes, gfp_t flags) {
 	heapptr_t hptr;
 	struct mptr *result;
 	size_t alloc_size;
-	if unlikely(OVERFLOW_UADD(sizeof(struct mptr), n_bytes, &alloc_size))
-		goto LOCAL_IF_NX_ELSE(err, err_overflow);
-#ifdef CONFIG_HAVE_KERNEL_SLAB_ALLOCATORS
 	if (n_bytes <= CONFIG_KERNEL_SLAB_MAXSIZE) {
 		void *slab_ptr;
 		slab_ptr = slab_malloc(n_bytes, flags);
 		if (slab_ptr)
 			return slab_ptr;
 	}
-#endif /* CONFIG_HAVE_KERNEL_SLAB_ALLOCATORS */
+	if unlikely(OVERFLOW_UADD(sizeof(struct mptr), n_bytes, &alloc_size))
+		goto LOCAL_IF_NX_ELSE(err, err_overflow);
 	hptr = LOCAL_heap_alloc_untraced(&kernel_heaps[flags & __GFP_HEAPMASK],
 	                                 alloc_size, flags);
 	LOCAL_IF_NX_ELSE(if unlikely(!heapptr_getsiz(hptr)) goto err;, )
@@ -106,6 +106,9 @@ LOCAL_NOTHROW(KCALL LOCAL_untraced_kmalloc)(size_t n_bytes, gfp_t flags) {
 LOCAL_IF_NX_ELSE(err:, err_overflow:)
 	LOCAL_IF_NX_ELSE(return NULL, THROW(E_BADALLOC_INSUFFICIENT_HEAP_MEMORY, n_bytes));
 }
+#else /* CONFIG_HAVE_KERNEL_SLAB_ALLOCATORS */
+DEFINE_INTERN_ALIAS(LOCAL_untraced_kmalloc, LOCAL_untraced_kmalloc_noslab);
+#endif /* !CONFIG_HAVE_KERNEL_SLAB_ALLOCATORS */
 
 INTERN ATTR_BLOCKLIKE_GFP(flags) ATTR_MALLOC WUNUSED VIRT void *
 LOCAL_NOTHROW(KCALL LOCAL_untraced_kmemalign)(size_t min_alignment,
@@ -163,7 +166,7 @@ LOCAL_NOTHROW(KCALL LOCAL_get_realloc_size)(size_t n_bytes) {
 	return result;
 err_overflow:
 	LOCAL_IF_NX_ELSE(return (size_t)-1,
-	          THROW(E_BADALLOC_INSUFFICIENT_HEAP_MEMORY, n_bytes));
+	                 THROW(E_BADALLOC_INSUFFICIENT_HEAP_MEMORY, n_bytes));
 }
 
 INTERN ATTR_BLOCKLIKE_GFP(flags) VIRT void *
diff --git a/kos/src/kernel/include/kernel/malloc-defs.h b/kos/src/kernel/include/kernel/malloc-defs.h
index 52593ff695..5bf7dacb21 100644
--- a/kos/src/kernel/include/kernel/malloc-defs.h
+++ b/kos/src/kernel/include/kernel/malloc-defs.h
@@ -198,8 +198,8 @@ DECL_BEGIN
 /*[[[end]]]*/
 
 #ifndef HEAP_ALIGNMENT
-#define HEAP_ALIGNMENT  CONFIG_KERNEL_HEAP_ALIGNMENT
-#endif
+#define HEAP_ALIGNMENT CONFIG_KERNEL_HEAP_ALIGNMENT
+#endif /* !HEAP_ALIGNMENT */
 #if HEAP_ALIGNMENT < __ALIGNOF_POINTER__
 #error "The kernel heap must support at least pointer alignment"
 #endif /* HEAP_ALIGNMENT < __ALIGNOF_POINTER__ */
@@ -209,7 +209,7 @@ DECL_BEGIN
 
 
 /* Kernel-space dynamic memory management. */
-#define __SIZEOF_GFP_T__ __SIZEOF_INT__
+#define __SIZEOF_GFP_T__ 4
 #ifdef __CC__
 typedef __UINT32_TYPE__ gfp_t;
 #endif /* __CC__ */
diff --git a/kos/src/libc/libc/assert.c b/kos/src/libc/libc/assert.c
index 9053156206..ffa6541191 100644
--- a/kos/src/libc/libc/assert.c
+++ b/kos/src/libc/libc/assert.c
@@ -466,7 +466,7 @@ NOTHROW(FCALL libc_vabortf_failure_core)(struct abortf_args *__restrict args) {
 	/* If the user has defined a custom sigaction for `SIGABRT',
 	 * then instead of directly  triggering a coredump, we  must
 	 * raise that signal at the given `&args->af_state'! */
-	/* TODO:  */
+	/* TODO: Must still set `__abort_msg' before calling this! */
 	maybe_raise_SIGABRT(&args->af_state);
 
 	/* Normal abort handling. */
diff --git a/kos/src/libc/libc/compat.c b/kos/src/libc/libc/compat.c
index 019622e7ca..5c57044eaf 100644
--- a/kos/src/libc/libc/compat.c
+++ b/kos/src/libc/libc/compat.c
@@ -245,9 +245,9 @@ struct IO_FILE_84 {
 	 */
 
 	/*32|64-bit * .................................... *     32-bit | 64-bit */
-	/* 0|  0*/ uint32_t io84_flags;                   /* if_ptr     | if_ptr */
+	/* 0|  0*/ uint32_t           io84_flags;         /* if_ptr     | if_ptr */
 #if __SIZEOF_POINTER__ > 4
-	/*     4*/ uint32_t _io84_pad;                    /* -          | if_ptr (cont.) */
+	/*     4*/ uint32_t          _io84_pad;           /* -          | if_ptr (cont.) */
 #endif /* __SIZEOF_POINTER__ > 4 */
 	/* 4|  8*/ byte_t            *io84_IO_read_ptr;   /* if_cnt     | if_cnt+__if_pad0 */
 	/* 8| 16*/ byte_t            *io84_IO_read_end;   /* if_base    | if_base */
@@ -286,7 +286,7 @@ struct IO_FILE_84 {
 
 struct linux_default_stdio_file {
 #if __SIZEOF_POINTER__ == 4
-	byte_t ldsf_zero[sizeof(struct IO_FILE_84) - sizeof(FILE)]; /* 0 bytes... */
+	byte_t ldsf_zero[sizeof(struct IO_FILE_84) - sizeof(FILE)]; /* Pad with 0-bytes. */
 	FILE   ldsf_stdio;                                          /* The actual file object */
 #elif __SIZEOF_POINTER__ == 8
 	FILE   ldsf_stdio;                                          /* The actual file object */
diff --git a/kos/src/libc/user/malloc.c b/kos/src/libc/user/malloc.c
index 598ac7cb52..890ce98989 100644
--- a/kos/src/libc/user/malloc.c
+++ b/kos/src/libc/user/malloc.c
@@ -59,6 +59,21 @@ DECL_BEGIN
 /*[[[skip:libc_mallinfo]]]*/
 /*[[[skip:libc_mallinfo2]]]*/
 
+#ifdef _MALLINFO_MATCHES_MALLINFO2
+static_assert(alignof(struct mallinfo) == alignof(struct mallinfo2));
+static_assert(sizeof(struct mallinfo) == sizeof(struct mallinfo2));
+static_assert(offsetof(struct mallinfo, arena) == offsetof(struct mallinfo2, arena));
+static_assert(offsetof(struct mallinfo, ordblks) == offsetof(struct mallinfo2, ordblks));
+static_assert(offsetof(struct mallinfo, smblks) == offsetof(struct mallinfo2, smblks));
+static_assert(offsetof(struct mallinfo, hblks) == offsetof(struct mallinfo2, hblks));
+static_assert(offsetof(struct mallinfo, hblkhd) == offsetof(struct mallinfo2, hblkhd));
+static_assert(offsetof(struct mallinfo, usmblks) == offsetof(struct mallinfo2, usmblks));
+static_assert(offsetof(struct mallinfo, fsmblks) == offsetof(struct mallinfo2, fsmblks));
+static_assert(offsetof(struct mallinfo, uordblks) == offsetof(struct mallinfo2, uordblks));
+static_assert(offsetof(struct mallinfo, fordblks) == offsetof(struct mallinfo2, fordblks));
+static_assert(offsetof(struct mallinfo, keepcost) == offsetof(struct mallinfo2, keepcost));
+#endif /* _MALLINFO_MATCHES_MALLINFO2 */
+
 #if __ARCH_REDIRECT_MAXBYTES != 0
 typedef void *(LIBCCALL *LPMALLOC)(size_t num_bytes);
 typedef void (LIBCCALL *LPFREE)(void *ptr);
@@ -95,9 +110,9 @@ struct user_malloc_abi {
 	LPPVALLOC            uma_pvalloc;
 	LPMALLOPT            uma_mallopt;
 	LPMALLINFO           uma_mallinfo;
-#if __SIZEOF_INT__ != __SIZEOF_SIZE_T__
+#ifndef _MALLINFO_MATCHES_MALLINFO2
 	LPMALLINFO2          uma_mallinfo2;
-#endif /* __SIZEOF_INT__ != __SIZEOF_SIZE_T__ */
+#endif /* !_MALLINFO_MATCHES_MALLINFO2 */
 	LPMALLOC_TRIM        uma_malloc_trim;
 	LPMALLOC_USABLE_SIZE uma_malloc_usable_size;
 
@@ -261,7 +276,7 @@ fallback_mallopt_NOOP(int param_number, int value) {
 	return 0;
 }
 
-#if __SIZEOF_INT__ != __SIZEOF_SIZE_T__
+#ifndef _MALLINFO_MATCHES_MALLINFO2
 PRIVATE struct mallinfo2 LIBCCALL
 fallback_mallinfo2_with_mallinfo(void) {
 	struct mallinfo info = mallinfo();
@@ -302,7 +317,7 @@ fallback_mallinfo_with_mallinfo2(void) {
 	result.keepcost = (int)(unsigned int)info.keepcost;
 	return result;
 }
-#endif /* __SIZEOF_INT__ != __SIZEOF_SIZE_T__ */
+#endif /* !_MALLINFO_MATCHES_MALLINFO2 */
 
 PRIVATE struct mallinfo LIBCCALL
 fallback_mallinfo_NOOP(void) {
@@ -362,12 +377,12 @@ user_malloc_abi_load(struct user_malloc_abi *__restrict self) {
 	*(void **)&self->uma_pvalloc = user_malloc_abi_dlsym(nameof_pvalloc, (void *)&libc_pvalloc);
 	*(void **)&self->uma_mallopt = user_malloc_abi_dlsym(nameof_mallopt, (void *)&libc_mallopt);
 	*(void **)&self->uma_mallinfo = user_malloc_abi_dlsym(nameof_mallinfo, (void *)&libc_mallinfo);
-#if __SIZEOF_INT__ != __SIZEOF_SIZE_T__
+#ifndef _MALLINFO_MATCHES_MALLINFO2
 	*(void **)&self->uma_mallinfo2 = user_malloc_abi_dlsym(nameof_mallinfo2, (void *)&libc_mallinfo2);
-#else /* __SIZEOF_INT__ != __SIZEOF_SIZE_T__ */
+#else /* !_MALLINFO_MATCHES_MALLINFO2 */
 	if (self->uma_mallinfo == NULL)
 		*(void **)&self->uma_mallinfo = user_malloc_abi_dlsym(nameof_mallinfo2, (void *)&libc_mallinfo2);
-#endif /* __SIZEOF_INT__ == __SIZEOF_SIZE_T__ */
+#endif /* _MALLINFO_MATCHES_MALLINFO2 */
 	*(void **)&self->uma_malloc_trim = user_malloc_abi_dlsym(nameof_malloc_trim, (void *)&libc_malloc_trim);
 	*(void **)&self->uma_malloc_usable_size = user_malloc_abi_dlsym(nameof_malloc_usable_size, (void *)&libc_malloc_usable_size);
 	if (*(void **)&self->uma_malloc_usable_size == NULL) {
@@ -421,7 +436,7 @@ user_malloc_abi_load(struct user_malloc_abi *__restrict self) {
 		self->uma_pvalloc = &fallback_pvalloc_with_valloc;
 	if (self->uma_mallopt == NULL)
 		self->uma_mallopt = &fallback_mallopt_NOOP;
-#if __SIZEOF_INT__ != __SIZEOF_SIZE_T__
+#ifndef _MALLINFO_MATCHES_MALLINFO2
 	if (self->uma_mallinfo2 == NULL) {
 		if (self->uma_mallinfo != NULL) {
 			self->uma_mallinfo2 = &fallback_mallinfo2_with_mallinfo;
@@ -437,10 +452,10 @@ user_malloc_abi_load(struct user_malloc_abi *__restrict self) {
 			self->uma_mallinfo = &fallback_mallinfo_NOOP;
 		}
 	}
-#else /* __SIZEOF_INT__ != __SIZEOF_SIZE_T__ */
+#else /* !_MALLINFO_MATCHES_MALLINFO2 */
 	if (self->uma_mallinfo == NULL)
 		self->uma_mallinfo = &fallback_mallinfo_NOOP;
-#endif /* __SIZEOF_INT__ == __SIZEOF_SIZE_T__ */
+#endif /* _MALLINFO_MATCHES_MALLINFO2 */
 	if (self->uma_malloc_trim == NULL)
 		self->uma_malloc_trim = &fallback_malloc_trim_NOOP;
 	if (self->uma_malloc_usable_size == NULL)
@@ -483,9 +498,9 @@ user_malloc_abi_install(struct user_malloc_abi *__restrict self) {
 	libc_malloc_redirect(nameof_pvalloc, (void *)&libc_pvalloc, *(void **)&self->uma_pvalloc);
 	libc_malloc_redirect(nameof_mallopt, (void *)&libc_mallopt, *(void **)&self->uma_mallopt);
 	libc_malloc_redirect(nameof_mallinfo, (void *)&libc_mallinfo, *(void **)&self->uma_mallinfo);
-#if __SIZEOF_INT__ != __SIZEOF_SIZE_T__
+#ifndef _MALLINFO_MATCHES_MALLINFO2
 	libc_malloc_redirect(nameof_mallinfo2, (void *)&libc_mallinfo2, *(void **)&self->uma_mallinfo2);
-#endif /* __SIZEOF_INT__ != __SIZEOF_SIZE_T__ */
+#endif /* !_MALLINFO_MATCHES_MALLINFO2 */
 	libc_malloc_redirect(nameof_malloc_trim, (void *)&libc_malloc_trim, *(void **)&self->uma_malloc_trim);
 	libc_malloc_redirect(nameof_malloc_usable_size, (void *)&libc_malloc_usable_size, *(void **)&self->uma_malloc_usable_size);
 	libc_malloc_redirect_opt(nameof_memdup, (void *)&libc_memdup, *(void **)&self->uma_memdup);
@@ -563,7 +578,7 @@ libc_init_malloc_hooks(void) {
  * NOTE: Since  this part happens *before* malloc() normally gets called, we don't
  *       have to worry about `libc_init_malloc_hooks()', since it will *never* get
  *       called! */
-typedef void (*LP__MALLOC_INITIALIZE_HOOK)(void);
+typedef void (LIBCCALL *LP__MALLOC_INITIALIZE_HOOK)(void);
 typedef void (LIBCCALL *LP__FREE_HOOK)(void *ptr, void const *return_address);
 typedef void *(LIBCCALL *LP__MALLOC_HOOK)(size_t num_bytes, void const *return_address);
 typedef void *(LIBCCALL *LP__REALLOC_HOOK)(void *ptr, size_t num_bytes, void const *return_address);
@@ -593,12 +608,12 @@ libdlmalloc_so_abi_load(struct user_malloc_abi *__restrict self) {
 	*(void **)&self->uma_valloc = get_dlmalloc_function(lib_dlmalloc, nameof_valloc);
 	*(void **)&self->uma_pvalloc = get_dlmalloc_function(lib_dlmalloc, nameof_pvalloc);
 	*(void **)&self->uma_mallopt = get_dlmalloc_function(lib_dlmalloc, nameof_mallopt);
-#if __SIZEOF_INT__ != __SIZEOF_SIZE_T__
+#ifndef _MALLINFO_MATCHES_MALLINFO2
 	*(void **)&self->uma_mallinfo2 = get_dlmalloc_function(lib_dlmalloc, nameof_mallinfo2);
 	self->uma_mallinfo             = &fallback_mallinfo_with_mallinfo2;
-#else /* __SIZEOF_INT__ != __SIZEOF_SIZE_T__ */
+#else /* !_MALLINFO_MATCHES_MALLINFO2 */
 	*(void **)&self->uma_mallinfo = get_dlmalloc_function(lib_dlmalloc, nameof_mallinfo2);
-#endif /* __SIZEOF_INT__ == __SIZEOF_SIZE_T__ */
+#endif /* _MALLINFO_MATCHES_MALLINFO2 */
 	*(void **)&self->uma_malloc_trim = get_dlmalloc_function(lib_dlmalloc, nameof_malloc_trim);
 	*(void **)&self->uma_malloc_usable_size = get_dlmalloc_function(lib_dlmalloc, nameof_malloc_usable_size);
 }
@@ -929,7 +944,7 @@ void *LIBCCALL libc_hooked_recallocv(void *mallptr, size_t elem_count, size_t el
 
 
 
-PRIVATE ATTR_SECTION(".text.crt.heap.rare_helpers") void
+PRIVATE ATTR_SECTION(".text.crt.heap.rare_helpers") void LIBCCALL
 libc_malloc_hooks_doinit(void) {
 	struct user_malloc_abi abi;
 	syslog(LOG_INFO, "[libc] Enable support for `__malloc_hook'\n");
diff --git a/kos/src/libdlmalloc/config.h b/kos/src/libdlmalloc/config.h
index 693f7d9b30..c60ba73cdd 100644
--- a/kos/src/libdlmalloc/config.h
+++ b/kos/src/libdlmalloc/config.h
@@ -295,13 +295,13 @@ DEFINE_DL_EXPORT_ALIAS(__libc_pvalloc, dlpvalloc);
 DEFINE_DL_EXPORT_ALIAS(_msize, dlmalloc_usable_size);
 DEFINE_DL_EXPORT_ALIAS(_msize_debug, dlmalloc_usable_size);
 
-#if __SIZEOF_INT__ == __SIZEOF_SIZE_T__
+#ifdef _MALLINFO_MATCHES_MALLINFO2
 DEFINE_DL_EXPORT_ALIAS(__libc_mallinfo, dlmallinfo);
 DEFINE_DL_EXPORT_ALIAS(mallinfo, dlmallinfo);
-#else /* __SIZEOF_INT__ == __SIZEOF_SIZE_T__ */
+#else /* _MALLINFO_MATCHES_MALLINFO2 */
 DEFINE_DL_EXPORT_ALIAS(__libc_mallinfo, libc_mallinfo_int);
 DEFINE_DL_EXPORT_ALIAS(mallinfo, libc_mallinfo_int);
-#endif /* __SIZEOF_INT__ != __SIZEOF_SIZE_T__ */
+#endif /* !_MALLINFO_MATCHES_MALLINFO2 */
 #endif /* __BUILDING_LIBC */
 #undef DEFINE_DL_EXPORT_ALIAS
 
@@ -322,17 +322,17 @@ DEFINE_INTERN_ALIAS(libc_memalign, dlmemalign);
 DEFINE_INTERN_ALIAS(libc_posix_memalign, dlposix_memalign);
 DEFINE_INTERN_ALIAS(libc_valloc, dlvalloc);
 DEFINE_INTERN_ALIAS(libc_mallopt, dlmallopt);
-#if __SIZEOF_INT__ == __SIZEOF_SIZE_T__
+#ifdef _MALLINFO_MATCHES_MALLINFO2
 DEFINE_INTERN_ALIAS(libc_mallinfo, dlmallinfo);
-#else /* __SIZEOF_INT__ == __SIZEOF_SIZE_T__ */
+#else /* _MALLINFO_MATCHES_MALLINFO2 */
 DEFINE_INTERN_ALIAS(libc_mallinfo, libc_mallinfo_int);
-#endif /* __SIZEOF_INT__ != __SIZEOF_SIZE_T__ */
+#endif /* !_MALLINFO_MATCHES_MALLINFO2 */
 DEFINE_INTERN_ALIAS(libc_mallinfo2, dlmallinfo);
 DEFINE_INTERN_ALIAS(libc_pvalloc, dlpvalloc);
 DEFINE_INTERN_ALIAS(libc_malloc_trim, dlmalloc_trim);
 DEFINE_INTERN_ALIAS(libc_malloc_usable_size, dlmalloc_usable_size);
 
-#if __SIZEOF_INT__ != __SIZEOF_SIZE_T__
+#ifndef _MALLINFO_MATCHES_MALLINFO2
 INTERN ATTR_SECTION(".text.crt.heap.malloc")
 struct mallinfo libc_mallinfo_int(void) {
 	struct mallinfo2 info = dlmallinfo();
@@ -349,7 +349,7 @@ struct mallinfo libc_mallinfo_int(void) {
 	result.keepcost = (int)(unsigned int)info.keepcost;
 	return result;
 }
-#endif /* __SIZEOF_INT__ != __SIZEOF_SIZE_T__ */
+#endif /* !_MALLINFO_MATCHES_MALLINFO2 */
 
 /* Old aliases from Glibc 2.0.4 */
 DEFINE_PUBLIC_ALIAS(__free, libc_free);