diff --git a/core/api/src/main/java/org/onosproject/net/flow/TrafficSelector.java b/core/api/src/main/java/org/onosproject/net/flow/TrafficSelector.java
index 9fe88d5..b92281f 100644
--- a/core/api/src/main/java/org/onosproject/net/flow/TrafficSelector.java
+++ b/core/api/src/main/java/org/onosproject/net/flow/TrafficSelector.java
@@ -419,6 +419,14 @@
         Builder matchArpSha(MacAddress addr);
 
         /**
+         * Matches a arp operation type.
+         *
+         * @param arpOp a arp operation type
+         * @return a selection builder
+         */
+        Builder matchArpOp(int arpOp);
+
+        /**
          * Builds an immutable traffic selector.
          *
          * @return traffic selector