diff --git a/docs/permissions/custom-rules.md b/docs/permissions/custom-rules.md
index 1408d732d3..bef1c0941f 100644
--- a/docs/permissions/custom-rules.md
+++ b/docs/permissions/custom-rules.md
@@ -30,7 +30,7 @@ export const isInSystemRule = createCatalogPermissionRule({
   },
   toQuery: (systemRef: string) => ({
     key: 'relations.partOf',
-    value: systemRef,
+    values: [systemRef],
   }),
 });