diff --git a/src/headfirst/designpatterns/combined/djview/BeatModelInterface.java b/src/headfirst/designpatterns/combined/djview/BeatModelInterface.java
index 72f194a2..dd5511c4 100755
--- a/src/headfirst/designpatterns/combined/djview/BeatModelInterface.java
+++ b/src/headfirst/designpatterns/combined/djview/BeatModelInterface.java
@@ -7,7 +7,7 @@ public interface BeatModelInterface {
   
 	void off();
   
-    void setBPM(int bpm);
+        void setBPM(int bpm);
   
 	int getBPM();