diff --git a/fs/cifs/smbencrypt.c b/fs/cifs/smbencrypt.c
index 6c1566366a6613cbc494fe46344c8fd00342a82b..a4232ec4f2ba45386b4f25db484f7f30135b01c2 100644
--- a/fs/cifs/smbencrypt.c
+++ b/fs/cifs/smbencrypt.c
@@ -221,7 +221,7 @@ E_md4hash(const unsigned char *passwd, unsigned char *p16,
 	}
 
 	rc = mdfour(p16, (unsigned char *) wpwd, len * sizeof(__le16));
-	memset(wpwd, 0, 129 * sizeof(__le16));
+	memzero_explicit(wpwd, sizeof(wpwd));
 
 	return rc;
 }