diff --git a/api-generator/components/panelmenu.js b/api-generator/components/panelmenu.js
index ccc23a40c..4a1928644 100644
--- a/api-generator/components/panelmenu.js
+++ b/api-generator/components/panelmenu.js
@@ -7,7 +7,7 @@ const PanelMenuProps = [
     },
     {
         name: "expandedKeys",
-        type: "array",
+        type: "object",
         default: "null",
         description: "A map of keys to represent the expansion state in controlled mode."
     },