diff --git a/newlib/libc/include/string.h b/newlib/libc/include/string.h
index 32199c027..3e66ec3dd 100644
--- a/newlib/libc/include/string.h
+++ b/newlib/libc/include/string.h
@@ -68,10 +68,12 @@ void *	 memccpy (void *__restrict, const void *__restrict, int, size_t);
 #endif
 #if __GNU_VISIBLE
 void *	 mempcpy (void *, const void *, size_t);
-void *	 memmem (const void *, size_t, const void *, size_t);
 void *	 memrchr (const void *, int, size_t);
 void *	 rawmemchr (const void *, int);
 #endif
+#if __GNU_VISIBLE || __POSIX_VISIBLE >= 202405
+void *	 memmem (const void *, size_t, const void *, size_t);
+#endif
 #if __POSIX_VISIBLE >= 200809
 char 	*stpcpy (char *__restrict, const char *__restrict);
 char 	*stpncpy (char *__restrict, const char *__restrict, size_t);
@@ -111,7 +113,7 @@ int	__xpg_strerror_r (int, char *, size_t);
 /* Reentrant version of strerror.  */
 char *	_strerror_r (struct _reent *, int, int, int *);
 
-#if __BSD_VISIBLE
+#if __BSD_VISIBLE || __POSIX_VISIBLE >= 202405L
 size_t	strlcat (char *, const char *, size_t);
 size_t	strlcpy (char *, const char *, size_t);
 #endif