1 files changed, 1 insertions, 1 deletions
diff --git a/src/main/java/gregtech/api/metatileentity/MetaPipeEntity.java b/src/main/java/gregtech/api/metatileentity/MetaPipeEntity.java
index 601b6fb4f9..1070c97364 100644
--- a/src/main/java/gregtech/api/metatileentity/MetaPipeEntity.java
+++ b/src/main/java/gregtech/api/metatileentity/MetaPipeEntity.java
@@ -503,7 +503,7 @@ public abstract class MetaPipeEntity implements IMetaTileEntity, IConnectable {
 
     @Override
     public ItemStack decrStackSize(int aIndex, int aAmount) {
-        ItemStack tStack = getStackInSlot(aIndex), rStack = GT_Utility.copy(tStack);
+        ItemStack tStack = getStackInSlot(aIndex), rStack = GT_Utility.copyOrNull(tStack);
         if (tStack != null) {
             if (tStack.stackSize <= aAmount) {
                 if (setStackToZeroInsteadOfNull(aIndex)) tStack.stackSize = 0;