diff --git a/src-ui/src/app/components/common/custom-fields-query-dropdown/custom-fields-query-dropdown.component.ts b/src-ui/src/app/components/common/custom-fields-query-dropdown/custom-fields-query-dropdown.component.ts
index 24e46b10b..633bc714f 100644
--- a/src-ui/src/app/components/common/custom-fields-query-dropdown/custom-fields-query-dropdown.component.ts
+++ b/src-ui/src/app/components/common/custom-fields-query-dropdown/custom-fields-query-dropdown.component.ts
@@ -53,8 +53,7 @@ export class CustomFieldQueriesModel {
   }
 
   private validateAtom(atom: CustomFieldQueryAtom) {
-    let valid: boolean = !!(atom.field && atom.operator && atom.value)
-    return valid
+    return !!(atom.field && atom.operator && atom.value !== null)
   }
 
   private validateExpression(expression: CustomFieldQueryExpression) {