diff --git a/configs/sama5d3x-ek/include/board.h b/configs/sama5d3x-ek/include/board.h
index 915727eec1a..8759dce559f 100644
--- a/configs/sama5d3x-ek/include/board.h
+++ b/configs/sama5d3x-ek/include/board.h
@@ -48,6 +48,10 @@
 
 /* Clocking *************************************************************************/
 
+/* Resulting clock frquencies *******************************************************/
+
+#define BOARD_MCK_FREQUENCY 0 /* FIXME */
+
 /* LED definitions ******************************************************************/
 
 #define LED_STARTED       0