diff --git a/tests/checkasm/aes.c b/tests/checkasm/aes.c
index c5502118fa..4bbfc5750b 100644
--- a/tests/checkasm/aes.c
+++ b/tests/checkasm/aes.c
@@ -46,13 +46,13 @@ void checkasm_check_aes(void)
                     iv[0][j] = iv[1][j] = rnd();
                 call_ref(&b, temp[0], pt, count, iv[0], b.rounds);
                 call_new(&b, temp[1], pt, count, iv[1], b.rounds);
-                if (memcmp(temp[0], temp[1], sizeof(16 * count)))
+                if (memcmp(temp[0], temp[1], 16 * count))
                     fail();
                 if (memcmp(iv[0], iv[1], sizeof(iv[0])))
                     fail();
                 call_ref(&b, temp[0], pt, count, NULL, b.rounds);
                 call_new(&b, temp[1], pt, count, NULL, b.rounds);
-                if (memcmp(temp[0], temp[1], sizeof(16 * count)))
+                if (memcmp(temp[0], temp[1], 16 * count))
                     fail();
                 if (memcmp(iv[0], iv[1], sizeof(iv[0])))
                     fail();