diff --git a/Polyhedron/demo/Polyhedron/MainWindow.cpp b/Polyhedron/demo/Polyhedron/MainWindow.cpp
index 6406d45c9ba..41291457b1d 100644
--- a/Polyhedron/demo/Polyhedron/MainWindow.cpp
+++ b/Polyhedron/demo/Polyhedron/MainWindow.cpp
@@ -1071,7 +1071,7 @@ bool MainWindow::open(QString filename, QString loader_name) {
     if(!item_opt) return false;
     else item = *item_opt;
   }
-  catch(std::logic_error e) {
+  catch(std::logic_error& e) {
     std::cerr << e.what() << std::endl;
     return false;
   }
diff --git a/Polyhedron/demo/Polyhedron/Plugins/Mesh_2/Mesh_2_plugin.cpp b/Polyhedron/demo/Polyhedron/Plugins/Mesh_2/Mesh_2_plugin.cpp
index d77d14eb97c..527ec779993 100644
--- a/Polyhedron/demo/Polyhedron/Plugins/Mesh_2/Mesh_2_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Plugins/Mesh_2/Mesh_2_plugin.cpp
@@ -284,7 +284,7 @@ private:
         Q_FOREACH(const std::vector<Kernel::Point_3>& points,
                     polylines_item->polylines)
           cdt.insert_constraint(points.begin(),points.end());
-    }catch(std::runtime_error)
+    }catch(std::runtime_error&)
     {
       QApplication::restoreOverrideCursor();
       throw;