diff --git a/gramps2/src/plugins/Verify.py b/gramps2/src/plugins/Verify.py
index ead00a4fa..c90b7b8e9 100644
--- a/gramps2/src/plugins/Verify.py
+++ b/gramps2/src/plugins/Verify.py
@@ -812,7 +812,7 @@ class UnknownGender(PersonRule):
     def broken(self):
         female = self.obj.get_gender() == RelLib.Person.FEMALE
         male = self.obj.get_gender() == RelLib.Person.MALE
-        return (male or female)
+        return not (male or female)
 
     def get_message(self):
         return _("Unknown gender")