diff --git a/TopoFeature.cpp b/TopoFeature.cpp
index fa1316b7..b0b9dbb5 100644
--- a/TopoFeature.cpp
+++ b/TopoFeature.cpp
@@ -776,7 +776,7 @@ void TopoFeature::lift_each_boundary_vertices(float percentile) {
   }
   ringi++;
   auto irings = bg::interior_rings(*(_p2));
-  for (Ring2& iring: irings) {
+  for (Ring2& iring : irings) {
     for (int i = 0; i < iring.size(); i++) {
       std::vector<int> &l = _lidarelevs[ringi][i];
       if (l.empty() == true)
@@ -790,38 +790,39 @@ void TopoFeature::lift_each_boundary_vertices(float percentile) {
   }
   //-- 2. find average height of the polygon
   double totalheight = 0.0;
-  int noheight = 0;
+  int heightcount = 0;
   oring = bg::exterior_ring(*(_p2));
   for (int i = 0; i < oring.size(); i++) {
     if (_p2z[0][i] != -9999) {
       totalheight += double(_p2z[0][i]);
-      noheight += 1;
+      heightcount += 1;
     }
   }
   int avgheight;
-  if (noheight > 0) {
-    avgheight = int(totalheight / double(noheight));
-    // std::clog << "avg height: " << avgheight << std::endl;
-    // std::clog << "no height " << noheight << std::endl;
-
-    //-- 3. some vertices will have no values (no lidar point within tolerance thus)
-    //--    assign them the avg
-    ringi = 0;
-    oring = bg::exterior_ring(*(_p2));
-    int pi;
-    for (int i = 0; i < oring.size(); i++) {
+  if (heightcount > 0)
+    avgheight = int(totalheight / double(heightcount));
+  else
+    avgheight = 0;
+  // std::clog << "avg height: " << avgheight << std::endl;
+  // std::clog << "height count " << heightcount << std::endl;
+
+  //-- 3. some vertices will have no values (no lidar point within tolerance thus)
+  //--    assign them the avg
+  ringi = 0;
+  oring = bg::exterior_ring(*(_p2));
+  int pi;
+  for (int i = 0; i < oring.size(); i++) {
+    if (_p2z[ringi][i] == -9999)
+      _p2z[ringi][i] = avgheight;
+  }
+  ringi++;
+  irings = bg::interior_rings(*(_p2));
+  for (Ring2& iring : irings) {
+    for (int i = 0; i < iring.size(); i++) {
       if (_p2z[ringi][i] == -9999)
         _p2z[ringi][i] = avgheight;
     }
     ringi++;
-    irings = bg::interior_rings(*(_p2));
-    for (Ring2& iring : irings) {
-      for (int i = 0; i < iring.size(); i++) {
-        if (_p2z[ringi][i] == -9999)
-          _p2z[ringi][i] = avgheight;
-      }
-      ringi++;
-    }
   }
 }