diff --git a/api-generator/components/cascadeselect.js b/api-generator/components/cascadeselect.js
index 3cf69159c..acdda674c 100644
--- a/api-generator/components/cascadeselect.js
+++ b/api-generator/components/cascadeselect.js
@@ -31,7 +31,7 @@ const CascadeSelectProps = [
     },
     {
         name: "optionGroupChildren",
-        type: "string",
+        type: "string[]",
         default: "null",
         description: "Property name or getter function to retrieve the items of a group."
     },