diff --git a/lib/web/websocket/receiver.js b/lib/web/websocket/receiver.js
index 29b3a32d87d..d1af7b46349 100644
--- a/lib/web/websocket/receiver.js
+++ b/lib/web/websocket/receiver.js
@@ -314,6 +314,10 @@ class ByteParser extends Writable {
       code = data.readUInt16BE(0)
     }
 
+    if (code !== undefined && !isValidStatusCode(code)) {
+      return { code: 1002, reason: 'Invalid status code', error: true }
+    }
+
     // https://datatracker.ietf.org/doc/html/rfc6455#section-7.1.6
     /** @type {Buffer} */
     let reason = data.subarray(2)
@@ -323,10 +327,6 @@ class ByteParser extends Writable {
       reason = reason.subarray(3)
     }
 
-    if (code !== undefined && !isValidStatusCode(code)) {
-      return { code: 1002, reason: 'Invalid status code', error: true }
-    }
-
     try {
       reason = utf8Decode(reason)
     } catch {