diff --git a/src/tests/kits/interface/NewRegion/Region.h b/src/tests/kits/interface/NewRegion/Region.h
index 1e22b86ae2..4c9243fb49 100644
--- a/src/tests/kits/interface/NewRegion/Region.h
+++ b/src/tests/kits/interface/NewRegion/Region.h
@@ -66,6 +66,7 @@ clipping_rect	RectAtInt(int32 index);
 /*----- Private or reserved -----------------------------------------*/
 private:
 		ClipRegion *fRegion;
+		char padding[24];
 };
 
 #endif /* _REGION_H */