diff --git a/src/engine/InterestManagement/HeightMap.java b/src/engine/InterestManagement/HeightMap.java
index 3909028d..176aaf36 100644
--- a/src/engine/InterestManagement/HeightMap.java
+++ b/src/engine/InterestManagement/HeightMap.java
@@ -116,8 +116,8 @@ public class HeightMap {
 
         this.heightMapID = 999999;
         this.maxHeight = 5; // for real...
-        int halfExtentsX = (int) Enum.CityBoundsType.ZONE.extents;
-        int halfExtentsY = (int) Enum.CityBoundsType.ZONE.extents;
+        int halfExtentsX = (int) Enum.CityBoundsType.GRID.extents;
+        int halfExtentsY = (int) Enum.CityBoundsType.GRID.extents;
         this.zoneLoadID = 0;
         this.seaLevel = 0;
         this.outsetX = 128;