diff --git a/python/nav/web/alertprofiles/forms.py b/python/nav/web/alertprofiles/forms.py
index 1783ecf59d..fb667b6176 100644
--- a/python/nav/web/alertprofiles/forms.py
+++ b/python/nav/web/alertprofiles/forms.py
@@ -657,7 +657,7 @@ def clean(self) -> Dict[str, Any]:
 
         if operator_type == Operator.IN:
             validated_data["value"] = "|".join(value)
-        elif operator_type == Operator.EQUALS:
+        elif operator_type == Operator.EQUALS and isinstance(value, list):
             validated_data["value"] = value[0]
 
         return validated_data