diff --git a/server/app.py b/server/app.py
index 49de2af..975617e 100644
--- a/server/app.py
+++ b/server/app.py
@@ -158,5 +158,6 @@ if __name__ == "__main__":
     flask_thread = Process(target=flask_api)
     flask_thread.start()
     time.sleep(1)
+    global result
     publisher_thread = Process(target=start_mqtt_publishers, args=(result, ))
     publisher_thread.start()