diff --git a/tests/api/test_camellia.c b/tests/api/test_camellia.c
index 4dbe6433d4..cc1845e5ed 100644
--- a/tests/api/test_camellia.c
+++ b/tests/api/test_camellia.c
@@ -126,6 +126,7 @@ int test_wc_CamelliaFree(void)
     byte zero[sizeof(camellia)];
 
     XMEMSET(zero, 0, sizeof(zero));
+    XMEMSET(&camellia, 0, sizeof(camellia));
 
     /* NULL is safe. */
     wc_CamelliaFree(NULL);