diff --git a/common/buildcraft/core/SpringPopulate.java b/common/buildcraft/core/SpringPopulate.java
index 2cfbf0e42d..e345aae36c 100644
--- a/common/buildcraft/core/SpringPopulate.java
+++ b/common/buildcraft/core/SpringPopulate.java
@@ -28,7 +28,7 @@ public class SpringPopulate {
 	@SubscribeEvent
 	public void populate(PopulateChunkEvent.Post event) {
 
-		boolean doGen = TerrainGen.populate(event.chunkProvider, event.world, event.rand, event.chunkX, event.chunkX, event.hasVillageGenerated, PopulateChunkEvent.Populate.EventType.CUSTOM);
+		boolean doGen = TerrainGen.populate(event.chunkProvider, event.world, event.rand, event.chunkX, event.chunkZ, event.hasVillageGenerated, PopulateChunkEvent.Populate.EventType.CUSTOM);
 
 		if (!doGen) {
 			event.setResult(Result.ALLOW);
diff --git a/common/buildcraft/energy/worldgen/OilPopulate.java b/common/buildcraft/energy/worldgen/OilPopulate.java
index 2c03c6100b..a46d695e9e 100644
--- a/common/buildcraft/energy/worldgen/OilPopulate.java
+++ b/common/buildcraft/energy/worldgen/OilPopulate.java
@@ -61,7 +61,7 @@ private OilPopulate() {
 
 	@SubscribeEvent
 	public void populate(PopulateChunkEvent.Pre event) {
-		boolean doGen = TerrainGen.populate(event.chunkProvider, event.world, event.rand, event.chunkX, event.chunkX, event.hasVillageGenerated, EVENT_TYPE);
+		boolean doGen = TerrainGen.populate(event.chunkProvider, event.world, event.rand, event.chunkX, event.chunkZ, event.hasVillageGenerated, EVENT_TYPE);
 
 		if (!doGen) {
 			event.setResult(Result.ALLOW);