diff --git a/src/engine_form.py b/src/engine_form.py
index af954ce..4e7cbf4 100644
--- a/src/engine_form.py
+++ b/src/engine_form.py
@@ -96,6 +96,8 @@ def detect_network_thread(self, engine, url):
         try:
             if len(url) > 0:
                 delay = get_ping_host(url)
+            else:
+                return
         except Exception as e:
             pass
         if delay != -1: