diff --git a/arkoala/framework/native/src/tree.h b/arkoala/framework/native/src/tree.h
index ddbe6a1114b1466b089e4a91eb6228071444f500..8a180b66a0129a9022e27c92cd49ba4346d789ed 100644
--- a/arkoala/framework/native/src/tree.h
+++ b/arkoala/framework/native/src/tree.h
@@ -74,7 +74,7 @@ struct TreeNode {
 
     template<class T>
     void setCustomVoidData(T *const ptr) {
-        _customVoidData = {ptr, [ptr](const void *) { delete ptr; });
+        _customVoidData = {ptr, [ptr](const void *) { delete ptr; }};
     }
 
     void *customVoidData() const {