diff --git a/Polyhedron/demo/Polyhedron/Scene_polyhedron_selection_item.cpp b/Polyhedron/demo/Polyhedron/Scene_polyhedron_selection_item.cpp
index 635a5e0eb29..dac9a06690a 100644
--- a/Polyhedron/demo/Polyhedron/Scene_polyhedron_selection_item.cpp
+++ b/Polyhedron/demo/Polyhedron/Scene_polyhedron_selection_item.cpp
@@ -1130,7 +1130,7 @@ bool Scene_polyhedron_selection_item:: treat_selection(const std::set<fg_edge_de
     case 3:
         if(out_degree(source(halfedge(ed,*polyhedron()),*polyhedron()),*polyhedron())<3 ||
            out_degree(target(halfedge(ed,*polyhedron()),*polyhedron()),*polyhedron())<3)
-          d->tempInstructions("Faces not joined : the two ends of the edge must have a degree of at least 3.",
+          d->tempInstructions("Faces not joined : the two endpoints of the edge must have a degree of at least 3.",
                            "Select the edge separating the faces you want to join."
                            "Warning: this operation will clear the undo stack.");
         else
@@ -1160,7 +1160,7 @@ bool Scene_polyhedron_selection_item:: treat_selection(const std::set<fg_edge_de
         }
         else if(!CGAL::Euler::does_satisfy_link_condition(ed, *polyhedron()))
         {
-          d->tempInstructions("Edge not collapsed : link condition not satidfied.",
+          d->tempInstructions("Edge not collapsed : link condition not satisfied.",
                            "Select the edge you want to collapse.");
         }
         else