diff --git a/Polyhedron/demo/Polyhedron/Scene_polygon_soup_item.cpp b/Polyhedron/demo/Polyhedron/Scene_polygon_soup_item.cpp
index dfe4f2898f5..e4d61b95ef9 100644
--- a/Polyhedron/demo/Polyhedron/Scene_polygon_soup_item.cpp
+++ b/Polyhedron/demo/Polyhedron/Scene_polygon_soup_item.cpp
@@ -512,7 +512,7 @@ Scene_polygon_soup_item::toolTip() const
     return QString();
 
   QString str = QObject::tr("<p><b>%1</b> (mode: %5, color: %6)<br />"
-                     "<i>Polygons soup</i></p>"
+                     "<i>Polygon soup</i></p>"
                      "<p>Number of vertices: %2<br />"
                      "Number of polygons: %3</p>")
     .arg(this->name())