diff --git a/plugins/terminals/fps_terminals/server.py b/plugins/terminals/fps_terminals/server.py
index c086f8c6..b63c4f1a 100644
--- a/plugins/terminals/fps_terminals/server.py
+++ b/plugins/terminals/fps_terminals/server.py
@@ -70,6 +70,7 @@ async def send_data(self):
                     await websocket.send_json(["stdout", self.data_or_disconnect])
 
     def quit(self, websocket):
-        self.websockets.remove(websocket)
+        if websocket in self.weksockets:
+            self.websockets.remove(websocket)
         if not self.websockets:
             os.close(self.fd)