diff --git a/arch/arm/src/cxd56xx/cxd56_rtc.c b/arch/arm/src/cxd56xx/cxd56_rtc.c
index ab4414a68c..44513d4125 100644
--- a/arch/arm/src/cxd56xx/cxd56_rtc.c
+++ b/arch/arm/src/cxd56xx/cxd56_rtc.c
@@ -52,6 +52,7 @@
 
 #include <arch/board/board.h>
 
+#include "clock/clock.h"
 #include "arm_arch.h"
 #include "cxd56_rtc.h"