diff --git a/src/main/java/net/minecraft/item/ItemStack.java b/src/main/java/net/minecraft/item/ItemStack.java
index fd73088..7f1f232 100644
--- a/src/main/java/net/minecraft/item/ItemStack.java
+++ b/src/main/java/net/minecraft/item/ItemStack.java
@@ -159,7 +159,7 @@
 
 		if (this.stackTagCompound != null)
 		{
-			p_77955_1_.setTag("tag", this.stackTagCompound);
+			p_77955_1_.setTag("tag", this.stackTagCompound.copy());
 		}
 
 		return p_77955_1_;