--- app/drag_drop_types.h
+++ app/drag_drop_types.h
@@ -21,7 +21,7 @@ class DragDropTypes {
 #if defined(OS_WIN)
   static uint32 DragOperationToDropEffect(int drag_operation);
   static int DropEffectToDragOperation(uint32 effect);
-#elif defined(OS_LINUX)
+#elif defined(USE_X11)
   static int DragOperationToGdkDragAction(int drag_operation);
   static int GdkDragActionToDragOperation(int gdk_drag_action);
 #endif
diff --git app/gfx/blit.cc app/gfx/blit.cc
index 359e142..f6b158a 100644