diff --git a/src/main/java/net/floodlightcontroller/core/internal/OFSwitchImpl.java b/src/main/java/net/floodlightcontroller/core/internal/OFSwitchImpl.java
index 0eca19c..467c74a 100644
--- a/src/main/java/net/floodlightcontroller/core/internal/OFSwitchImpl.java
+++ b/src/main/java/net/floodlightcontroller/core/internal/OFSwitchImpl.java
@@ -402,7 +402,7 @@
      */
     @Override
     public String toString() {
-        return "OFSwitchImpl [" + channel.getRemoteAddress() + " DPID[" + ((stringId != null) ? stringId : "?") + "]]";
+        return "OFSwitchImpl [" + ((channel != null) ? channel.getRemoteAddress() : "?") + " DPID[" + ((stringId != null) ? stringId : "?") + "]]";
     }
 
     @Override