diff --git a/libsrc/interface/read_fnf_mesh.cpp b/libsrc/interface/read_fnf_mesh.cpp
index 2394f510..83d583bf 100644
--- a/libsrc/interface/read_fnf_mesh.cpp
+++ b/libsrc/interface/read_fnf_mesh.cpp
@@ -469,5 +469,6 @@ namespace netgen
         else
           PrintMessage(3, "parse line: (", buf, ")");
       }
+    mesh.ComputeNVertices();
   }
 }