diff --git a/src/main/java/net/onrc/onos/core/matchaction/MatchActionId.java b/src/main/java/net/onrc/onos/core/matchaction/MatchActionId.java
index 0bddffa..bea973e 100644
--- a/src/main/java/net/onrc/onos/core/matchaction/MatchActionId.java
+++ b/src/main/java/net/onrc/onos/core/matchaction/MatchActionId.java
@@ -20,6 +20,13 @@
     }
 
     /**
+     * no-arg constructor for Kryo.
+     */
+    protected MatchActionId() {
+        value = -1;
+    }
+
+    /**
      * Returns the MatchActionId as a long.
      *
      * @return MatchAction ID