diff --git a/packages/engine/Source/Core/HeightmapTerrainData.js b/packages/engine/Source/Core/HeightmapTerrainData.js
index 20f1bc74cbc..5e1309393d3 100644
--- a/packages/engine/Source/Core/HeightmapTerrainData.js
+++ b/packages/engine/Source/Core/HeightmapTerrainData.js
@@ -898,6 +898,6 @@ function setHeight(
       divisor /= elementMultiplier;
     }
   }
-  heights[index + i] = height;
+  heights[index + i] = Math.round(height);
 }
 export default HeightmapTerrainData;