diff --git a/src/main/java/net/onrc/onos/api/intent/IIntentRuntimeService.java b/src/main/java/net/onrc/onos/api/intent/IIntentRuntimeService.java
index 2b7b517..a3b1705 100644
--- a/src/main/java/net/onrc/onos/api/intent/IIntentRuntimeService.java
+++ b/src/main/java/net/onrc/onos/api/intent/IIntentRuntimeService.java
@@ -5,6 +5,7 @@
 
 import net.onrc.onos.api.flowmanager.ConflictDetectionPolicy;
 import net.onrc.onos.api.flowmanager.Flow;
+import net.onrc.onos.api.flowmanager.FlowId;
 
 /**
  * An interface class for the Intent-Runtime Service. The role of the
@@ -128,7 +129,7 @@
      * @param flowId ID of the target IFlow object.
      * @return Intent which manages the specified IFlow object, null otherwise.
      */
-    Intent getIntentByFlow(String flowId);
+    Intent getIntentByFlow(FlowId flowId);
 
     /**
      * Sets a conflict detection policy.
diff --git a/src/main/java/net/onrc/onos/core/newintent/IntentRuntimeModule.java b/src/main/java/net/onrc/onos/core/newintent/IntentRuntimeModule.java
index 59cfec0..cabc1a7 100644
--- a/src/main/java/net/onrc/onos/core/newintent/IntentRuntimeModule.java
+++ b/src/main/java/net/onrc/onos/core/newintent/IntentRuntimeModule.java
@@ -5,6 +5,7 @@
 
 import net.onrc.onos.api.flowmanager.ConflictDetectionPolicy;
 import net.onrc.onos.api.flowmanager.Flow;
+import net.onrc.onos.api.flowmanager.FlowId;
 import net.onrc.onos.api.intent.IIntentRuntimeService;
 import net.onrc.onos.api.intent.Intent;
 import net.onrc.onos.api.intent.IntentBatchOperation;
@@ -84,7 +85,7 @@
     }
 
     @Override
-    public Intent getIntentByFlow(String flowId) {
+    public Intent getIntentByFlow(FlowId flowId) {
         // TODO Auto-generated method stub
         return null;
     }