diff --git a/libsrc/meshing/improve3.cpp b/libsrc/meshing/improve3.cpp
index bb90bada..7138e0ab 100644
--- a/libsrc/meshing/improve3.cpp
+++ b/libsrc/meshing/improve3.cpp
@@ -3802,6 +3802,7 @@ void MeshOptimize3d :: SwapImprove2Sequential (Mesh & mesh, OPTIMIZEGOAL goal)
   */
 
 
+  mesh.Compress();
   bad1 = mesh.CalcTotalBad (mp);
   (*testout) << "Total badness = " << bad1 << endl;
   (*testout) << "swapimprove2 done" << "\n";
@@ -3890,6 +3891,7 @@ void MeshOptimize3d :: SwapImprove2 (Mesh & mesh, OPTIMIZEGOAL goal)
 
   PrintMessage (5, cnt, " swaps performed");
 
+  mesh.Compress();
   bad1 = mesh.CalcTotalBad (mp);
   (*testout) << "Total badness = " << bad1 << endl;
   (*testout) << "swapimprove2 done" << "\n";