diff --git a/src/main/java/net/floodlightcontroller/flowcache/IFlowService.java b/src/main/java/net/floodlightcontroller/flowcache/IFlowService.java
index 45cdde0..b6df1e2 100644
--- a/src/main/java/net/floodlightcontroller/flowcache/IFlowService.java
+++ b/src/main/java/net/floodlightcontroller/flowcache/IFlowService.java
@@ -86,7 +86,7 @@
     /**
      * Add and maintain a shortest-path flow.
      *
-     * NOTE: The Flow Path does NOT contain all flow entries.
+     * NOTE: The Flow Path argument does NOT contain all flow entries.
      * Instead, it contains a single dummy flow entry that is used to
      * store the matching condition(s).
      * That entry is replaced by the appropriate entries from the
@@ -94,9 +94,7 @@
      *
      * @param flowPath the Flow Path with the endpoints and the match
      * conditions to install.
-     * @param flowId the return-by-reference Flow ID as assigned internally.
-     * @return true on success, otherwise false.
+     * @return the added shortest-path flow on success, otherwise null.
      */
-    public boolean addAndMaintainShortestPathFlow(FlowPath flowPath,
-						  FlowId flowId);
+    public FlowPath addAndMaintainShortestPathFlow(FlowPath flowPath);
 }