diff --git a/cli/src/main/java/org/onosproject/cli/net/DeviceKeyListCommand.java b/cli/src/main/java/org/onosproject/cli/net/DeviceKeyListCommand.java
index 82ff98a..98ac00e 100644
--- a/cli/src/main/java/org/onosproject/cli/net/DeviceKeyListCommand.java
+++ b/cli/src/main/java/org/onosproject/cli/net/DeviceKeyListCommand.java
@@ -72,7 +72,7 @@
             print(FMT_USERNAME_PASSWORD, deviceKey.deviceKeyId().id(), deviceKey.type(),
                   deviceKey.asUsernamePassword().username(), deviceKey.asUsernamePassword().password());
         } else {
-            log.error("Unsupported device key type: " + deviceKey.type());
+            log.error("Unsupported device key type: {}" + deviceKey.type());
         }
     }