diff --git a/netbox/utilities/constants.py b/netbox/utilities/constants.py
index 9f027f8e1..1ad0d4847 100644
--- a/netbox/utilities/constants.py
+++ b/netbox/utilities/constants.py
@@ -23,7 +23,7 @@ FILTER_NUMERIC_BASED_LOOKUP_MAP = dict(
     lt='lt',
     gte='gte',
     gt='gt',
-    empty='isnull',
+    empty='empty',
 )
 
 FILTER_NEGATION_LOOKUP_MAP = dict(