diff --git a/Polyhedron/demo/Polyhedron/Plugins/PMP/Isotropic_remeshing_plugin.cpp b/Polyhedron/demo/Polyhedron/Plugins/PMP/Isotropic_remeshing_plugin.cpp
index 222e0310031..ffd400db798 100644
--- a/Polyhedron/demo/Polyhedron/Plugins/PMP/Isotropic_remeshing_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Plugins/PMP/Isotropic_remeshing_plugin.cpp
@@ -608,6 +608,12 @@ public Q_SLOTS:
                .number_of_relaxation_steps(nb_smooth)
                .edge_is_constrained_map(ecm)
                .relax_constraints(smooth_features));
+
+          //recollect sharp edges
+          for(edge_descriptor e : edges(pmesh))
+            eif[e] = false;
+          for(edge_descriptor e : edges_to_protect)
+            eif[e] = true;
         }
         if (fpmap_valid)
         {