diff --git a/packages/server/src/websockets/builder.ts b/packages/server/src/websockets/builder.ts
index 6a0a401925..ff7c50ebf4 100644
--- a/packages/server/src/websockets/builder.ts
+++ b/packages/server/src/websockets/builder.ts
@@ -14,9 +14,9 @@ export default class BuilderSocket extends BaseSocket {
     super(app, server, "/socket/builder", [authorized(permissions.BUILDER)])
   }
 
-  async onConnect(socket: ?Socket) {
+  async onConnect(socket?: Socket) {
     // Initial identification of selected app
-    socket.on(BuilderSocketEvent.SelectApp, async (appId, callback) => {
+    socket?.on(BuilderSocketEvent.SelectApp, async (appId, callback) => {
       await this.joinRoom(socket, appId)
 
       // Reply with all users in current room