diff --git a/libsrc/meshing/meshclass.cpp b/libsrc/meshing/meshclass.cpp
index 4e76e9aa..76634bfb 100644
--- a/libsrc/meshing/meshclass.cpp
+++ b/libsrc/meshing/meshclass.cpp
@@ -1321,6 +1321,7 @@ namespace netgen
     archive & segments;
     archive & facedecoding;
     archive & materials & bcnames & cd2names & cd3names;
+    archive & numvertices;
 
     archive & *ident;