diff --git a/src/main/java/com/comphenix/protocol/PacketType.java b/src/main/java/com/comphenix/protocol/PacketType.java
index a4de543a..316c71d2 100644
--- a/src/main/java/com/comphenix/protocol/PacketType.java
+++ b/src/main/java/com/comphenix/protocol/PacketType.java
@@ -731,7 +731,7 @@ public class PacketType implements Serializable, Cloneable, Comparable<PacketTyp
     private boolean forceAsync;
 
     private boolean dynamic;
-    private int hashCode;
+    private transient int hashCode;
 
     /**
      * Retrieve the current packet/legacy lookup.