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-rw-r--r--src/main/java/gregtech/api/GregTech_API.java2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/main/java/gregtech/api/GregTech_API.java b/src/main/java/gregtech/api/GregTech_API.java
index 1cc19e7de4..932d267a34 100644
--- a/src/main/java/gregtech/api/GregTech_API.java
+++ b/src/main/java/gregtech/api/GregTech_API.java
@@ -389,7 +389,7 @@ public class GregTech_API {
* @param aZ is the Z-Coord of the update causing Block
*/
public static boolean causeMachineUpdate(World aWorld, int aX, int aY, int aZ) {
- if (!aWorld.isRemote) {
+ if (aWorld != null && !aWorld.isRemote) { //World might be null during Worldgen
GT_Runnable_MachineBlockUpdate.setMachineUpdateValues(aWorld, aX, aY, aZ);
return true;
}