diff --git a/packages/frontend-2/lib/viewer/composables/filtering/filtering.ts b/packages/frontend-2/lib/viewer/composables/filtering/filtering.ts
index 1bd885510..a03b25d9f 100644
--- a/packages/frontend-2/lib/viewer/composables/filtering/filtering.ts
+++ b/packages/frontend-2/lib/viewer/composables/filtering/filtering.ts
@@ -275,7 +275,7 @@ export function useFilterUtilities(
   const isBooleanPropertyInfo = (
     prop: PropertyInfo | BooleanPropertyInfo
   ): prop is BooleanPropertyInfo => {
-    return 'type' in prop && (prop as BooleanPropertyInfo).type === 'boolean'
+    return prop.type === 'boolean'
   }
 
   const createFilterData = (params: CreateFilterParams): FilterData => {
diff --git a/packages/frontend-2/lib/viewer/helpers/filters/types.ts b/packages/frontend-2/lib/viewer/helpers/filters/types.ts
index ff1499a02..11e907c2b 100644
--- a/packages/frontend-2/lib/viewer/helpers/filters/types.ts
+++ b/packages/frontend-2/lib/viewer/helpers/filters/types.ts
@@ -77,7 +77,7 @@ export type StringFilterData = BaseFilterData & {
   isDefaultAllSelected?: boolean
 }
 
-export type BooleanPropertyInfo = PropertyInfo & {
+export type BooleanPropertyInfo = Omit<PropertyInfo, 'type'> & {
   type: 'boolean'
   valueGroups: { value: boolean; ids: string[] }[]
 }