diff --git a/Triangulation_3/demo/Triangulation_3/Viewer.h b/Triangulation_3/demo/Triangulation_3/Viewer.h
index 70c72181a29..617cafabeb3 100644
--- a/Triangulation_3/demo/Triangulation_3/Viewer.h
+++ b/Triangulation_3/demo/Triangulation_3/Viewer.h
@@ -398,7 +398,7 @@ private:
   Coords_ptr incremental_next_point;
   Coords_ptr incremental_facet;
   Coords_ptr incremental_conflict;
-  //pickin
+  //picking
   QMap<float, int> picked_IDs;
   QPoint picking_pos;