diff --git a/lib/cuckoo/core/database.py b/lib/cuckoo/core/database.py
index 2ed368dcade..8cc5261a316 100644
--- a/lib/cuckoo/core/database.py
+++ b/lib/cuckoo/core/database.py
@@ -444,7 +444,10 @@ def delete_tag_orphans(session, ctx):
 
     def __del__(self):
         """Disconnects pool."""
-        self.engine.dispose()
+        try:
+            self.engine.dispose()
+        except KeyError:
+            pass
 
     def _connect_database(self, connection_string):
         """Connect to a Database.