diff --git a/src/main/java/net/onrc/onos/core/devicemanager/OnosDeviceManager.java b/src/main/java/net/onrc/onos/core/devicemanager/OnosDeviceManager.java
index 30ad722..a724caa 100644
--- a/src/main/java/net/onrc/onos/core/devicemanager/OnosDeviceManager.java
+++ b/src/main/java/net/onrc/onos/core/devicemanager/OnosDeviceManager.java
@@ -319,7 +319,7 @@
 
     @Override
     public void deleteOnosDeviceByMac(MACAddress mac) {
-        OnosDevice deleteDevice = mapDevice.get(mac);
+        OnosDevice deleteDevice = mapDevice.get(mac.toLong());
         deleteOnosDevice(deleteDevice);
     }