diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/config/NetworkConfigEvent.java b/incubator/api/src/main/java/org/onosproject/incubator/net/config/NetworkConfigEvent.java
index e381f5a..1673f73 100644
--- a/incubator/api/src/main/java/org/onosproject/incubator/net/config/NetworkConfigEvent.java
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/config/NetworkConfigEvent.java
@@ -29,10 +29,20 @@
      */
     public enum Type {
         /**
+         * Signifies that a network configuration was registered.
+         */
+        CONFIG_REGISTERED,
+
+        /**
+         * Signifies that a network configuration was unregistered.
+         */
+        CONFIG_UNREGISTERED,
+
+        /**
          * Signifies that network configuration was added.
          */
-
         CONFIG_ADDED,
+
         /**
          * Signifies that network configuration was updated.
          */