diff --git a/libsrc/interface/writeuser.cpp b/libsrc/interface/writeuser.cpp
index 6aa5754e..cafe38ae 100644
--- a/libsrc/interface/writeuser.cpp
+++ b/libsrc/interface/writeuser.cpp
@@ -250,7 +250,11 @@ void WriteNeutralFormat (const Mesh & mesh,
 	  outfile << " ";
 	  outfile.width(8);
 	  outfile << seg[1];
-
+          if (seg[2] != -1)
+            {
+              outfile.width(8);
+              outfile << seg[2];
+            }
 	  outfile << "\n";
 	}
     }