diff --git a/src/tls.c b/src/tls.c
index b4bd9faa3..2cb5d45e0 100644
--- a/src/tls.c
+++ b/src/tls.c
@@ -10136,6 +10136,8 @@ static WC_INLINE byte GetHmacLength(int hmac)
         case sm3_mac:
             return WC_SM3_DIGEST_SIZE;
     #endif
+        default:
+            break;
     }
     return 0;
 }