diff --git a/wolfcrypt/src/port/st/stsafe.c b/wolfcrypt/src/port/st/stsafe.c
index 00ed2915e9..6b60e4b35c 100644
--- a/wolfcrypt/src/port/st/stsafe.c
+++ b/wolfcrypt/src/port/st/stsafe.c
@@ -822,12 +822,13 @@ static int stsafe_verify(stsafe_curve_id_t curve_id, uint8_t* pHash,
 #endif
     StSafeA_VerifySignatureBuffer* Verif = NULL;
 
-    *pResult = 0;
-
-    if (hashSz == 0) {
+    if (pHash == NULL || pSigRS == NULL || pPubKeyX == NULL ||
+        pPubKeyY == NULL || pResult == NULL || hashSz == 0) {
         return BAD_FUNC_ARG;
     }
 
+    *pResult = 0;
+
 #if defined(WOLFSSL_SMALL_STACK) && !defined(WOLFSSL_NO_MALLOC)
     /* Allocate buffers */
     R = (StSafeA_SignatureBuffer*)XMALLOC(key_sz + 2, NULL,