diff --git a/headers/private/interface/RegionSupport.h b/headers/private/interface/RegionSupport.h
index 92cfd1890c..7ceeb60986 100644
--- a/headers/private/interface/RegionSupport.h
+++ b/headers/private/interface/RegionSupport.h
@@ -3,8 +3,8 @@
 #ifndef __REGION_SUPPORT_H
 #define __REGION_SUPPORT_H
 
-struct clipping_rect;
-class BRegion;
+#include <Region.h>
+
 class BRegion::Support {
 public:
 	static void ZeroRegion(BRegion &region);