diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/U16.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/U16.java
index 43bec7a..c52a74a 100644
--- a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/U16.java
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/U16.java
@@ -60,7 +60,7 @@
 
     @Override
     public String toString() {
-        return "" + f(raw);
+        return Integer.toString(f(raw));
     }
 
     @Override
@@ -110,4 +110,9 @@
     public U16 applyMask(U16 mask) {
         return ofRaw( (short) (raw & mask.raw));
     }
+
+    @Override
+    public int compareTo(U16 o) {
+        return Integer.compare(f(raw), f(o.raw));
+    }
 }