diff --git a/options/posix/generic/strings-stubs.cpp b/options/posix/generic/strings-stubs.cpp
index e4de0702dd..cb602dc75f 100644
--- a/options/posix/generic/strings-stubs.cpp
+++ b/options/posix/generic/strings-stubs.cpp
@@ -92,3 +92,8 @@ int strncasecmp(const char *a, const char *b, size_t size) {
 	return mlibc::strncasecmp(a, b, size);
 }
 
+// Marked as obsolete in posix 2008 but used by at least tracker
+void bzero(void *s, size_t n) {
+	memset(s, 0, n);
+}
+
diff --git a/options/posix/include/strings.h b/options/posix/include/strings.h
index 5310509c09..e194608113 100644
--- a/options/posix/include/strings.h
+++ b/options/posix/include/strings.h
@@ -17,6 +17,9 @@ int ffs(int word);
 int strcasecmp(const char *a, const char *b);
 int strncasecmp(const char *a, const char *b, size_t size);
 
+// Marked as obsolete in posix 2008 but used by at least tracker
+void bzero(void *s, size_t n);
+
 #endif /* !__MLIBC_ABI_ONLY */
 
 #ifdef __cplusplus