diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/VRF.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/VRF.java
index cda5699..10e2ebc 100644
--- a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/VRF.java
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/VRF.java
@@ -1,8 +1,11 @@
 package org.projectfloodlight.openflow.types;
 
-import org.jboss.netty.buffer.ChannelBuffer;
 import javax.annotation.concurrent.Immutable;
 
+import org.jboss.netty.buffer.ChannelBuffer;
+
+import com.google.common.primitives.UnsignedInts;
+
 @Immutable
 public class VRF implements OFValueType<VRF> {
     static final int LENGTH = 4;
@@ -67,4 +70,9 @@
     public VRF applyMask(VRF mask) {
         return VRF.of(this.rawValue & mask.rawValue);
     }
+
+    @Override
+    public int compareTo(VRF o) {
+        return UnsignedInts.compare(rawValue, o.rawValue);
+    }
 }