diff --git a/src/main/java/gtPlusPlus/xmod/gregtech/common/tileentities/machines/multi/production/turbines/GregtechMetaTileEntity_LargerTurbineBase.java b/src/main/java/gtPlusPlus/xmod/gregtech/common/tileentities/machines/multi/production/turbines/GregtechMetaTileEntity_LargerTurbineBase.java
index 11bfa8eb2..9da73e131 100644
--- a/src/main/java/gtPlusPlus/xmod/gregtech/common/tileentities/machines/multi/production/turbines/GregtechMetaTileEntity_LargerTurbineBase.java
+++ b/src/main/java/gtPlusPlus/xmod/gregtech/common/tileentities/machines/multi/production/turbines/GregtechMetaTileEntity_LargerTurbineBase.java
@@ -744,7 +744,7 @@ public void onPostTick(IGregTechTileEntity aBaseMetaTileEntity, long aTick) {
     }
 
     @Override
-    public void stopMachine(ShutDownReason reason) {
+    public void stopMachine(@NotNull ShutDownReason reason) {
         baseEff = 0;
         optFlow = 0;
         disableAllTurbineHatches();