diff --git a/src/plugins/tool/Check.py b/src/plugins/tool/Check.py
index 2703eeae6..dfcf917a6 100644
--- a/src/plugins/tool/Check.py
+++ b/src/plugins/tool/Check.py
@@ -1098,7 +1098,7 @@ class CheckIntegrity(object):
                                         'exist in the database' % 
                                         {'gid' : family.gramps_id,
                                          'hand' : event_handle})
-                        Utils.make_unknown(event_handle, self.explanation,
+                        Utils.make_unknown(event_handle, self.explanation.handle,
                                 self.class_event, self.commit_event, self.trans)
                         self.invalid_events.add(key)
                 if none_handle: