diff --git a/porting/linux/user/src/malloc/malloc.c b/porting/linux/user/src/malloc/malloc.c
index ec60a378c0640310b9aceaa35786bff341369a65..d35ba97677f0f2d53a3bcf6485b4248f4763c63b 100644
--- a/porting/linux/user/src/malloc/malloc.c
+++ b/porting/linux/user/src/malloc/malloc.c
@@ -563,7 +563,7 @@ void *calloc(size_t m, size_t n)
 	void *p=malloc(n);
 	if(!p) return p;
 	if(!__malloc_replaced) {
-		if(IS_MMAPPED(MEM_TO_CHUNK(P)))
+		if(IS_MMAPPED(MEM_TO_CHUNK(p)))
 			return p;
 		if(n >= PAGE_SIZE)
 			n = mal0_clear(p, PAGE_SIZE, n);