diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/IpEcn.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/IpEcn.java
index 5ecd251..7e1cdf0 100644
--- a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/IpEcn.java
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/IpEcn.java
@@ -10,6 +10,7 @@
     ECN_11((byte)3),
     ECN_NO_MASK((byte)0xFF);
 
+    public static final IpEcn NONE = ECN_00;
     public static final IpEcn NO_MASK = ECN_NO_MASK;
     public static final IpEcn FULL_MASK = ECN_00;