diff --git a/lib/hcrypto/md2.c b/lib/hcrypto/md2.c
index 26254acee..b6517a631 100644
--- a/lib/hcrypto/md2.c
+++ b/lib/hcrypto/md2.c
@@ -130,5 +130,5 @@ MD2_Final (void *res, struct md2 *m)
     MD2_Update(m, pad, 16);
 
     memcpy(res, m->state, MD2_DIGEST_LENGTH);
-    memset(m, 0, sizeof(m));
+    memset(m, 0, sizeof(*m));
 }