diff --git a/wolfcrypt/src/aes.c b/wolfcrypt/src/aes.c
index 3bba8e0b29..ea0d320c48 100644
--- a/wolfcrypt/src/aes.c
+++ b/wolfcrypt/src/aes.c
@@ -13803,6 +13803,10 @@ static WARN_UNUSED_RESULT int AesSivCipher(
     }
 #endif
 
+    if (aes != NULL) {
+        XMEMSET(&aes, 0, sizeof(Aes));
+    }
+
     if (ret == 0) {
         ret = wc_AesInit(aes, NULL, INVALID_DEVID);
         if (ret != 0) {