diff --git a/src/HeatLayer.js b/src/HeatLayer.js
index 455df17..d0e7cdc 100644
--- a/src/HeatLayer.js
+++ b/src/HeatLayer.js
@@ -145,7 +145,7 @@ L.HeatLayer = (L.Layer ? L.Layer : L.Class).extend({
                 var alt =
                     this._latlngs[i].alt !== undefined ? this._latlngs[i].alt :
                     this._latlngs[i][2] !== undefined ? +this._latlngs[i][2] : 1;
-                k = alt * v;
+                k = alt; 
 
                 grid[y] = grid[y] || [];
                 cell = grid[y][x];