1 files changed, 3 insertions, 0 deletions
diff --git a/editor/plugins/polygon_2d_editor_plugin.h b/editor/plugins/polygon_2d_editor_plugin.h
index 0f10b6b645..3793a0130c 100644
--- a/editor/plugins/polygon_2d_editor_plugin.h
+++ b/editor/plugins/polygon_2d_editor_plugin.h
@@ -35,6 +35,9 @@
 
 class ViewPanner;
 class ScrollContainer;
+class Panel;
+class HSlider;
+class SpinBox;
 
 class Polygon2DEditor : public AbstractPolygon2DEditor {
 	GDCLASS(Polygon2DEditor, AbstractPolygon2DEditor);