diff --git a/wolfcrypt/src/port/silabs/silabs_aes.c b/wolfcrypt/src/port/silabs/silabs_aes.c
index 2177a58e6..ccc759b4d 100644
--- a/wolfcrypt/src/port/silabs/silabs_aes.c
+++ b/wolfcrypt/src/port/silabs/silabs_aes.c
@@ -48,7 +48,7 @@ int wc_AesSetKey(Aes* aes, const byte* userKey, word32 keylen,
         return BUFFER_E;
     }
 
-    XMEMSET(aes, 0, sizeof(aes));
+    XMEMSET(aes, 0, sizeof(*aes));
 
     if (keylen > sizeof(aes->key)) {
         return BAD_FUNC_ARG;