1 files changed, 3 insertions, 0 deletions
diff --git a/editor/plugins/skeleton_3d_editor_plugin.h b/editor/plugins/skeleton_3d_editor_plugin.h
index 273bdeaac8..8ef61861d0 100644
--- a/editor/plugins/skeleton_3d_editor_plugin.h
+++ b/editor/plugins/skeleton_3d_editor_plugin.h
@@ -45,6 +45,9 @@ class Joint;
 class PhysicalBone3D;
 class Skeleton3DEditorPlugin;
 class Button;
+class Tree;
+class TreeItem;
+class VSeparator;
 
 class BoneTransformEditor : public VBoxContainer {
 	GDCLASS(BoneTransformEditor, VBoxContainer);