diff --git a/common/buildcraft/core/lib/utils/ThreadSafeUtils.java b/common/buildcraft/core/lib/utils/ThreadSafeUtils.java
index 9d425422..25d6d3f0 100644
--- a/common/buildcraft/core/lib/utils/ThreadSafeUtils.java
+++ b/common/buildcraft/core/lib/utils/ThreadSafeUtils.java
@@ -70,6 +70,6 @@ public final class ThreadSafeUtils {
 			}
 		}
 		packet.writeData(data);
-		return new FMLProxyPacket(data, channel.attr(NetworkRegistry.FML_CHANNEL).get());
+		return new FMLProxyPacket(data.copy(), channel.attr(NetworkRegistry.FML_CHANNEL).get());
 	}
 }