diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/VlanVid.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/VlanVid.java
index 5c23779..d6f65d5 100644
--- a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/VlanVid.java
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/VlanVid.java
@@ -3,6 +3,8 @@
 import org.jboss.netty.buffer.ChannelBuffer;
 import org.projectfloodlight.openflow.exceptions.OFParseError;
 
+import com.google.common.primitives.Shorts;
+
 public class VlanVid implements OFValueType<VlanVid> {
 
     private static final short VALIDATION_MASK = 0x0FFF;
@@ -86,4 +88,9 @@
         return VlanVid.of((short)(this.vid & mask.vid));
     }
 
+    @Override
+    public int compareTo(VlanVid o) {
+        return Shorts.compare(vid, o.vid);
+    }
+
 }