diff --git a/lib/java/src/protocol/TProtocolException.java b/lib/java/src/protocol/TProtocolException.java
index 783b5be..9373de3 100644
--- a/lib/java/src/protocol/TProtocolException.java
+++ b/lib/java/src/protocol/TProtocolException.java
@@ -20,6 +20,7 @@
   public static final int NEGATIVE_SIZE = 2;
   public static final int SIZE_LIMIT = 3;
   public static final int BAD_VERSION = 4;
+  public static final int NOT_IMPLEMENTED = 5;
 
   protected int type_ = UNKNOWN;