diff --git a/bin/crawlers/Crawler.py b/bin/crawlers/Crawler.py
index fd86da8a..417dab4f 100755
--- a/bin/crawlers/Crawler.py
+++ b/bin/crawlers/Crawler.py
@@ -219,6 +219,8 @@ class Crawler(AbstractModule):
         task = capture.get_task()
         domain = task.get_domain()
         print(domain)
+        if not domain:
+            raise Exception(f'Error: domain {domain}')
 
         self.domain = Domain(domain)
         self.original_domain = Domain(domain)