diff --git a/msba2-common/include/msba2_common.h b/msba2-common/include/msba2_common.h
index a9d9d3e72c..fff12f965d 100644
--- a/msba2-common/include/msba2_common.h
+++ b/msba2-common/include/msba2_common.h
@@ -24,8 +24,8 @@ and the mailinglist (subscription via web site)
 	scatterweb@lists.spline.inf.fu-berlin.de
 *******************************************************************************/
 
-#ifndef __BOARD_H
-#define __BOARD_H
+#ifndef __MSBA2_COMMON_H
+#define __MSBA2_COMMON_H
 
 /**
  * @ingroup		msb_a2
@@ -48,4 +48,4 @@ and the mailinglist (subscription via web site)
 #define VICIntEnClear VICIntEnClr
 
 /** @} */
-#endif // __BOARD_H
+#endif // __MSBA2_COMMON_H
diff --git a/msba2/include/board.h b/msba2/include/board.h
index bf596f0ee1..2b1f28fd2a 100644
--- a/msba2/include/board.h
+++ b/msba2/include/board.h
@@ -2,6 +2,7 @@
 #define __BOARD_H 
 
 #include <msba2_common.h>
+#include <bitarithm.h>
 
 #define LED_RED_PIN (BIT25)
 #define LED_GREEN_PIN (BIT26)