diff --git a/src/malloc/calloc.c b/src/malloc/calloc.c
new file mode 100644
index 0000000000000000000000000000000000000000..322193ca868b8e8ed76f7b3d17c431e762a3ac3b
--- /dev/null
+++ b/src/malloc/calloc.c
@@ -0,0 +1,37 @@
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <errno.h>
+
+static size_t mal0_clear(char *p, size_t n)
+{
+	const size_t pagesz = 4096; /* arbitrary */
+	if (n < pagesz) return n;
+#ifdef __GNUC__
+	typedef uint64_t __attribute__((__may_alias__)) T;
+#else
+	typedef unsigned char T;
+#endif
+	char *pp = p + n;
+	size_t i = (uintptr_t)pp & (pagesz - 1);
+	for (;;) {
+		pp = memset(pp - i, 0, i);
+		if (pp - p < pagesz) return pp - p;
+		for (i = pagesz; i; i -= 2*sizeof(T), pp -= 2*sizeof(T))
+		        if (((T *)pp)[-1] | ((T *)pp)[-2])
+				break;
+	}
+}
+
+void *calloc(size_t m, size_t n)
+{
+	if (n && m > (size_t)-1/n) {
+		errno = ENOMEM;
+		return 0;
+	}
+	n *= m;
+	void *p = malloc(n);
+	if (!p) return p;
+	n = mal0_clear(p, n);
+	return memset(p, 0, n);
+}
diff --git a/src/malloc/lite_malloc.c b/src/malloc/lite_malloc.c
index c3f0c129acbcb88e58a59a9231c0650f602753c3..f8931ba597dcadcd56a00e8858c89cbe43a6b8fb 100644
--- a/src/malloc/lite_malloc.c
+++ b/src/malloc/lite_malloc.c
@@ -101,14 +101,3 @@ static void *__simple_malloc(size_t n)
 }
 
 weak_alias(__simple_malloc, malloc);
-
-static void *__simple_calloc(size_t m, size_t n)
-{
-	if (n && m > (size_t)-1/n) {
-		errno = ENOMEM;
-		return 0;
-	}
-	return __simple_malloc(n * m);
-}
-
-weak_alias(__simple_calloc, calloc);
diff --git a/src/malloc/oldmalloc/malloc.c b/src/malloc/oldmalloc/malloc.c
index df3ea1becd3d5eb81ab68cb8e493b3ba27e81b6c..afa75722b8f716c51d40eebc4079a83d46f13016 100644
--- a/src/malloc/oldmalloc/malloc.c
+++ b/src/malloc/oldmalloc/malloc.c
@@ -341,42 +341,6 @@ void *malloc(size_t n)
 	return CHUNK_TO_MEM(c);
 }
 
-static size_t mal0_clear(char *p, size_t pagesz, size_t n)
-{
-#ifdef __GNUC__
-	typedef uint64_t __attribute__((__may_alias__)) T;
-#else
-	typedef unsigned char T;
-#endif
-	char *pp = p + n;
-	size_t i = (uintptr_t)pp & (pagesz - 1);
-	for (;;) {
-		pp = memset(pp - i, 0, i);
-		if (pp - p < pagesz) return pp - p;
-		for (i = pagesz; i; i -= 2*sizeof(T), pp -= 2*sizeof(T))
-		        if (((T *)pp)[-1] | ((T *)pp)[-2])
-				break;
-	}
-}
-
-void *calloc(size_t m, size_t n)
-{
-	if (n && m > (size_t)-1/n) {
-		errno = ENOMEM;
-		return 0;
-	}
-	n *= m;
-	void *p = malloc(n);
-	if (!p) return p;
-	if (!__malloc_replaced) {
-		if (IS_MMAPPED(MEM_TO_CHUNK(p)))
-			return p;
-		if (n >= PAGE_SIZE)
-			n = mal0_clear(p, PAGE_SIZE, n);
-	}
-	return memset(p, 0, n);
-}
-
 void *realloc(void *p, size_t n)
 {
 	struct chunk *self, *next;