diff --git a/Straight_skeleton_2/demo/Straight_skeleton_2/straight_skeleton_2_layers.h b/Straight_skeleton_2/demo/Straight_skeleton_2/straight_skeleton_2_layers.h
index 40a5bb26b19..84b5774c39f 100644
--- a/Straight_skeleton_2/demo/Straight_skeleton_2/straight_skeleton_2_layers.h
+++ b/Straight_skeleton_2/demo/Straight_skeleton_2/straight_skeleton_2_layers.h
@@ -36,7 +36,7 @@ public:
     , mSSkelPtr(aSSkelPtr)
 	, null_halfedge()
 	, null_vertex()
-  }
+  {}
 
   void draw()
   {