diff --git a/src/dtls.c b/src/dtls.c
index 9196cea08..381372032 100644
--- a/src/dtls.c
+++ b/src/dtls.c
@@ -671,8 +671,8 @@ static int SendStatelessReplyDtls13(const WOLFSSL* ssl, WolfSSL_CH* ch,
             goto dtls13_cleanup;
 
         /* Push the cookie to extensions */
-        ret = CreateCookieExt(ssl, cookieHash, cookieHashSz, &parsedExts,
-                              cs.cipherSuite0, cs.cipherSuite);
+        ret = CreateCookieExt(ssl, cookieHash, (word16)cookieHashSz,
+                              &parsedExts, cs.cipherSuite0, cs.cipherSuite);
         if (ret != 0)
             goto dtls13_cleanup;
 
diff --git a/src/tls13.c b/src/tls13.c
index d08951a82..96e6137b9 100644
--- a/src/tls13.c
+++ b/src/tls13.c
@@ -3350,7 +3350,7 @@ int CreateCookieExt(const WOLFSSL* ssl, byte* hash, word16 hashSz,
     word16 cookieSz = 0;
 
     /* Cookie Data = Hash Len | Hash | CS | KeyShare Group */
-    cookie[cookieSz++] = hashSz;
+    cookie[cookieSz++] = (byte)hashSz;
     XMEMCPY(cookie + cookieSz, hash, hashSz);
     cookieSz += hashSz;
     cookie[cookieSz++] = cipherSuite0;