diff --git a/src/malloc/malloc_usable_size.c b/src/malloc/malloc_usable_size.c
index 7a8ed6c4..672b518a 100644
--- a/src/malloc/malloc_usable_size.c
+++ b/src/malloc/malloc_usable_size.c
@@ -1,7 +1,7 @@
 #include <malloc.h>
 #include "malloc_impl.h"
-
-void *(*const __realloc_dep)(void *, size_t) = realloc;
+ 
+hidden void *(*const __realloc_dep)(void *, size_t) = realloc;
 
 size_t malloc_usable_size(void *p)
 {