diff --git a/arch/arm/src/stm32f7/stm32_rtc.c b/arch/arm/src/stm32f7/stm32_rtc.c
index 5b29d410f02..835b5a7229c 100644
--- a/arch/arm/src/stm32f7/stm32_rtc.c
+++ b/arch/arm/src/stm32f7/stm32_rtc.c
@@ -48,6 +48,7 @@
 
 #include <nuttx/arch.h>
 #include <nuttx/irq.h>
+#include <nuttx/time.h>
 
 #include "up_arch.h"