diff --git a/Makefile b/Makefile
index efcd7c0..6d46869 100644
--- a/Makefile
+++ b/Makefile
@@ -70,9 +70,7 @@ QJS_OBJS=$(OBJDIR)/qjs.o $(OBJDIR)/quickjs.o $(OBJDIR)/libregexp.o $(OBJDIR)/lib
 		$(OBJDIR)/libbf.o $(OBJDIR)/cmdopt.o
 
 STD_OBJS=$(OBJDIR)/string_impl.o $(OBJDIR)/malloc_impl.o $(OBJDIR)/math_impl.o \
-		$(OBJDIR)/math_log_impl.o $(OBJDIR)/math_pow_impl.o $(OBJDIR)/printf_impl.o $(OBJDIR)/stdio_impl.o \
-		$(OBJDIR)/locale_impl.o
-
+		$(OBJDIR)/math_log_impl.o $(OBJDIR)/math_pow_impl.o $(OBJDIR)/printf_impl.o $(OBJDIR)/stdio_impl.o
 
 all: build/ckb-js-vm
 
diff --git a/include/c-stdlib/my_locale.h b/include/c-stdlib/my_locale.h
deleted file mode 100644
index 6b9848f..0000000
--- a/include/c-stdlib/my_locale.h
+++ /dev/null
@@ -1,41 +0,0 @@
-#ifndef _STDLIB_LOCALE_H_
-#define _STDLIB_LOCALE_H_
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-struct lconv {
-    char *decimal_point;
-    char *thousands_sep;
-    char *grouping;
-
-    char *int_curr_symbol;
-    char *currency_symbol;
-    char *mon_decimal_point;
-    char *mon_thousands_sep;
-    char *mon_grouping;
-    char *positive_sign;
-    char *negative_sign;
-    char int_frac_digits;
-    char frac_digits;
-    char p_cs_precedes;
-    char p_sep_by_space;
-    char n_cs_precedes;
-    char n_sep_by_space;
-    char p_sign_posn;
-    char n_sign_posn;
-    char int_p_cs_precedes;
-    char int_p_sep_by_space;
-    char int_n_cs_precedes;
-    char int_n_sep_by_space;
-    char int_p_sign_posn;
-    char int_n_sign_posn;
-};
-
-struct lconv *localeconv(void);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
diff --git a/include/c-stdlib/src/locale_impl.c b/include/c-stdlib/src/locale_impl.c
deleted file mode 100644
index 72bf30d..0000000
--- a/include/c-stdlib/src/locale_impl.c
+++ /dev/null
@@ -1,31 +0,0 @@
-#include <limits.h>
-#include "my_locale.h"
-
-static const struct lconv posix_lconv = {
-    .decimal_point = ".",
-    .thousands_sep = "",
-    .grouping = "",
-    .int_curr_symbol = "",
-    .currency_symbol = "",
-    .mon_decimal_point = "",
-    .mon_thousands_sep = "",
-    .mon_grouping = "",
-    .positive_sign = "",
-    .negative_sign = "",
-    .int_frac_digits = CHAR_MAX,
-    .frac_digits = CHAR_MAX,
-    .p_cs_precedes = CHAR_MAX,
-    .p_sep_by_space = CHAR_MAX,
-    .n_cs_precedes = CHAR_MAX,
-    .n_sep_by_space = CHAR_MAX,
-    .p_sign_posn = CHAR_MAX,
-    .n_sign_posn = CHAR_MAX,
-    .int_p_cs_precedes = CHAR_MAX,
-    .int_p_sep_by_space = CHAR_MAX,
-    .int_n_cs_precedes = CHAR_MAX,
-    .int_n_sep_by_space = CHAR_MAX,
-    .int_p_sign_posn = CHAR_MAX,
-    .int_n_sign_posn = CHAR_MAX,
-};
-
-struct lconv *localeconv(void) { return (void *)&posix_lconv; }
diff --git a/include/c-stdlib/src/string_impl.c b/include/c-stdlib/src/string_impl.c
index 13b7180..118abcc 100644
--- a/include/c-stdlib/src/string_impl.c
+++ b/include/c-stdlib/src/string_impl.c
@@ -1,7 +1,6 @@
 #include <limits.h>
 #include "my_math.h"
 #include "my_setjmp.h"
-#include "my_locale.h"
 #include <stdint.h>
 #include <stdarg.h>
 #include <stdbool.h>