diff --git a/facade/src/main/java/com/iluwatar/facade/DwarvenMineWorker.java b/facade/src/main/java/com/iluwatar/facade/DwarvenMineWorker.java
index bb80ae874..b313dd989 100644
--- a/facade/src/main/java/com/iluwatar/facade/DwarvenMineWorker.java
+++ b/facade/src/main/java/com/iluwatar/facade/DwarvenMineWorker.java
@@ -86,7 +86,7 @@ public abstract class DwarvenMineWorker {
 
   public abstract String name();
 
-  static enum Action {
+  enum Action {
     GO_TO_SLEEP, WAKE_UP, GO_HOME, GO_TO_MINE, WORK
   }
 }