diff --git a/libpsx/src/memory.c b/libpsx/src/memory.c
index 1d0e6de..3c63dc7 100644
--- a/libpsx/src/memory.c
+++ b/libpsx/src/memory.c
@@ -115,14 +115,9 @@ malloc_keep_finding:
 void *calloc(size_t number, size_t size)
 {
 	void *ptr = malloc(number * size);
-	unsigned char *cptr = (unsigned char*)ptr;
-	int x;
 
-	if(ptr == NULL)
-		ptr = NULL;
-
-	for(x = 0; x < (number * size); x++)
-		cptr[x] = 0;
+	if (ptr)
+		memset(ptr, 0, number * size);
 
 	return ptr;
 }