diff --git a/src/main/java/org/apache/commons/logging/impl/SimpleLog.java b/src/main/java/org/apache/commons/logging/impl/SimpleLog.java
index f12a66c..19d5cce 100644
--- a/src/main/java/org/apache/commons/logging/impl/SimpleLog.java
+++ b/src/main/java/org/apache/commons/logging/impl/SimpleLog.java
@@ -286,6 +286,8 @@ public class SimpleLog implements Log, Serializable {
             case "off":
                 setLevel(LOG_LEVEL_OFF);
                 break;
+            default:
+                // do nothing
             }
         }
     }