diff --git a/src/main/java/net/onrc/onos/apps/forwarding/Forwarding.java b/src/main/java/net/onrc/onos/apps/forwarding/Forwarding.java
index 2ed8ba5..68bfaff 100644
--- a/src/main/java/net/onrc/onos/apps/forwarding/Forwarding.java
+++ b/src/main/java/net/onrc/onos/apps/forwarding/Forwarding.java
@@ -65,7 +65,7 @@
         IForwardingService, IEventChannelListener<Long, IntentStateList> {
     private final static Logger log = LoggerFactory.getLogger(Forwarding.class);
 
-    private final int SLEEP_TIME_FOR_DB_DEVICE_INSTALLED = 100; // milliseconds
+    private static final int SLEEP_TIME_FOR_DB_DEVICE_INSTALLED = 100; // milliseconds
     private final static int NUMBER_OF_THREAD_FOR_EXECUTOR = 1;
 
     private final static ScheduledExecutorService executor = Executors.newScheduledThreadPool(NUMBER_OF_THREAD_FOR_EXECUTOR);