diff --git a/src/me/ryanhamshire/GriefPrevention/BlockEventHandler.java b/src/me/ryanhamshire/GriefPrevention/BlockEventHandler.java
index 13136c4..8d020aa 100644
--- a/src/me/ryanhamshire/GriefPrevention/BlockEventHandler.java
+++ b/src/me/ryanhamshire/GriefPrevention/BlockEventHandler.java
@@ -211,7 +211,7 @@ public class BlockEventHandler implements Listener
 			if(block.getY() <= claim.lesserBoundaryCorner.getBlockY() && claim.allowBuild(player, block.getType()) == null)
 			{
 				//extend the claim downward
-				this.dataStore.extendClaim(claim, claim.getLesserBoundaryCorner().getBlockY() - GriefPrevention.instance.config_claims_claimsExtendIntoGroundDistance);
+				this.dataStore.extendClaim(claim, block.getY() - GriefPrevention.instance.config_claims_claimsExtendIntoGroundDistance);
 			}
 			
 			//allow for a build warning in the future