diff --git a/src/engine/InterestManagement/Terrain.java b/src/engine/InterestManagement/Terrain.java
index 36644ae4..16a6a4a2 100644
--- a/src/engine/InterestManagement/Terrain.java
+++ b/src/engine/InterestManagement/Terrain.java
@@ -38,7 +38,7 @@ public class Terrain {
         // that all similar terrains share.  (See JSON)
 
         if (this.zone.terrain_type.equals("PLANAR"))
-            this.heightmap = 1006301;  // all 0
+            this.heightmap = 1006300;  // all 0
 
         // Load pixel data for this terrain from cache