diff --git a/src/pim-types.ts b/src/pim-types.ts
index 4102988..9f30b85 100644
--- a/src/pim-types.ts
+++ b/src/pim-types.ts
@@ -387,6 +387,6 @@ export class ContactType implements PimType {
 
   get group() {
     const kind = this.comp.getFirstPropertyValue("kind");
-    return kind in ["group", "organization"];
+    return ["group", "organization"].includes(kind);
   }
 }