diff --git a/mem/mem0dbg.c b/mem/mem0dbg.c
index 0823cb93c79..41c4bb281c4 100644
--- a/mem/mem0dbg.c
+++ b/mem/mem0dbg.c
@@ -223,6 +223,8 @@ mem_init_buf(
 {
 	byte*	ptr;
 
+	UNIV_MEM_ASSERT_W(buf, n);
+
 	for (ptr = buf; ptr < buf + n; ptr++) {
 
 		if (ut_rnd_gen_ibool()) {
@@ -247,6 +249,8 @@ mem_erase_buf(
 {
 	byte*	ptr;
 
+	UNIV_MEM_ASSERT_W(buf, n);
+
 	for (ptr = buf; ptr < buf + n; ptr++) {
 		if (ut_rnd_gen_ibool()) {
 			*ptr = 0xDE;