diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualNetworkFlowRuleStore.java b/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualNetworkFlowRuleStore.java
index 0567083..a5a212a 100644
--- a/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualNetworkFlowRuleStore.java
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualNetworkFlowRuleStore.java
@@ -27,6 +27,10 @@
 
 import java.util.List;
 
+/**
+ * Manages inventory of flow rules for virtual networks;
+ * not intended for direct use.
+ */
 public interface VirtualNetworkFlowRuleStore
         extends VirtualStore<FlowRuleBatchEvent, FlowRuleStoreDelegate> {
     /**