diff --git a/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/BgpValueType.java b/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/BgpValueType.java
old mode 100755
new mode 100644
index fbf53b3..af7f4b7
--- a/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/BgpValueType.java
+++ b/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/BgpValueType.java
@@ -36,4 +36,12 @@
      * @return length written to channel buffer
      */
     int write(ChannelBuffer cb);
+
+    /**
+     * Compares two objects.
+     *
+     * @param o object
+     * @return result after comparing two objects
+     */
+    int compareTo(Object o);
 }
\ No newline at end of file