diff --git a/os/win/dnd.h b/os/win/dnd.h
index 4ffcc2983..855038411 100644
--- a/os/win/dnd.h
+++ b/os/win/dnd.h
@@ -54,7 +54,7 @@ class DragTargetAdapter : public IDropTarget {
                                  DWORD* pdwEffect) override;
 
 private:
-  DragEvent DragTargetAdapter::newDragEvent(POINTL* pt, DWORD* pdwEffect);
+  DragEvent newDragEvent(POINTL* pt, DWORD* pdwEffect);
 
   ULONG m_ref = 0;
   Window* m_window = nullptr;