diff --git a/src/Prep/TerraFit/terrafit.cc b/src/Prep/TerraFit/terrafit.cc
index a23fb5d4..fbbb26c6 100644
--- a/src/Prep/TerraFit/terrafit.cc
+++ b/src/Prep/TerraFit/terrafit.cc
@@ -180,6 +180,8 @@ void fit_file(const std::string& path) {
                 return;
         }
         
+        gzprintf(fp,"%d\n",mesh->pointCount());
+        
         for (int x=0;x<DEM->width;x++) {
                 for (int y=0;y<DEM->height;y++) {
                         if (mesh->is_used(x,y) != DATA_POINT_USED)