diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/OFBitMask128.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/OFBitMask128.java
index 2827a72..5cec233 100644
--- a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/OFBitMask128.java
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/OFBitMask128.java
@@ -2,6 +2,8 @@
 
 import org.jboss.netty.buffer.ChannelBuffer;
 
+import com.google.common.hash.PrimitiveSink;
+
 public class OFBitMask128 implements OFValueType<OFBitMask128> {
 
     static final int LENGTH = 16;
@@ -89,4 +91,10 @@
         return Long.signum(this.raw2 - o.raw2);
     }
 
+    @Override
+    public void putTo(PrimitiveSink sink) {
+        sink.putLong(raw1);
+        sink.putLong(raw2);
+    }
+
 }