diff --git a/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/NewAdaptiveFlowStatsCollector.java b/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/NewAdaptiveFlowStatsCollector.java
index a81367c..487cae9 100644
--- a/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/NewAdaptiveFlowStatsCollector.java
+++ b/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/NewAdaptiveFlowStatsCollector.java
@@ -492,6 +492,7 @@
     /**
      * returns flowMissingXid that indicates the execution of flowMissing process or not(NO_FLOW_MISSING_XID(-1)).
      *
+     * @return xid of missing flow
      */
     public long getFlowMissingXid() {
         return flowMissingXid;