diff --git a/wolfcrypt/src/wc_pkcs11.c b/wolfcrypt/src/wc_pkcs11.c
index bd3133464..cd57c0468 100644
--- a/wolfcrypt/src/wc_pkcs11.c
+++ b/wolfcrypt/src/wc_pkcs11.c
@@ -1759,7 +1759,7 @@ static int Pkcs11GetEccParams(Pkcs11Session* session, CK_OBJECT_HANDLE privKey,
     if (ret == 0) {
         /* PKCS #11 wraps the OID in ASN.1 */
         curveId = wc_ecc_get_curve_id_from_oid(oid + 2,
-                                                    template[0].ulValueLen - 2);
+                                            (word32)template[0].ulValueLen - 2);
         if (curveId == ECC_CURVE_INVALID)
             ret = WC_HW_E;
     }