diff --git a/apps/cpman/api/src/main/java/org/onosproject/cpman/MetricsDatabase.java b/apps/cpman/api/src/main/java/org/onosproject/cpman/MetricsDatabase.java
index 9d4ce08..54167b8 100644
--- a/apps/cpman/api/src/main/java/org/onosproject/cpman/MetricsDatabase.java
+++ b/apps/cpman/api/src/main/java/org/onosproject/cpman/MetricsDatabase.java
@@ -141,6 +141,7 @@
          * Add a new metric to be monitored.
          *
          * @param metricType control metric type
+         * @return builder object
          */
         Builder addMetricType(String metricType);