diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_orient_soup_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_orient_soup_plugin.cpp
index 60a312124bc..e86de67108a 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_orient_soup_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_orient_soup_plugin.cpp
@@ -113,6 +113,9 @@ void Polyhedron_demo_orient_soup_plugin::orient()
       }
       QApplication::restoreOverrideCursor();
     }
+    else{
+      messages->warning(tr("This function is only applicable on polygon soups."));
+    }
   }
 }