diff --git a/src/engine/InterestManagement/HeightMap.java b/src/engine/InterestManagement/HeightMap.java
index 5566f6e0..ba4df79a 100644
--- a/src/engine/InterestManagement/HeightMap.java
+++ b/src/engine/InterestManagement/HeightMap.java
@@ -91,7 +91,7 @@ public class HeightMap {
         float calculatedWidthX = this.fullExtentsX / numOfBucketsX;
         this.bucketWidthX = calculatedWidthX;
 
-        float numOfBucketsY = this.heightmapImage.getWidth() - 1;
+        float numOfBucketsY = this.heightmapImage.getHeight() - 1;
         float calculatedWidthY = this.fullExtentsY / numOfBucketsY;
         this.bucketWidthX = calculatedWidthY;