diff --git a/thermion_dart/lib/src/viewer/src/ffi/src/ffi_filament_app.dart b/thermion_dart/lib/src/viewer/src/ffi/src/ffi_filament_app.dart
index 32b95f97..dd1e6401 100644
--- a/thermion_dart/lib/src/viewer/src/ffi/src/ffi_filament_app.dart
+++ b/thermion_dart/lib/src/viewer/src/ffi/src/ffi_filament_app.dart
@@ -794,7 +794,8 @@ class FFIFilamentApp extends FilamentApp<Pointer> {
               cb));
     }
     if (loadResourcesAsync) {
-      if(!GltfResourceLoader_asyncBeginLoad(gltfResourceLoader, filamentAsset)) {
+      final result = await withBoolCallback((cb) => GltfResourceLoader_asyncBeginLoadRenderThread(gltfResourceLoader, filamentAsset, cb));
+      if(!result) {
         throw Exception("Failed to begin async loading");
       }
       GltfResourceLoader_asyncUpdateLoad(gltfResourceLoader);