diff --git a/src/client/websocket/WebSocketManager.js b/src/client/websocket/WebSocketManager.js
index c483e803b8c5..eb4a8282c9e6 100644
--- a/src/client/websocket/WebSocketManager.js
+++ b/src/client/websocket/WebSocketManager.js
@@ -216,7 +216,7 @@ class WebSocketManager {
           return;
         }
 
-        if (event.code >= 1000 && event.code <= 2000) {
+        if (event.code === 1000 || event.code === 4006) {
           // Any event code in this range cannot be resumed.
           shard.sessionID = undefined;
         }