diff --git a/arch/arm/src/stm32/stm32_rtc.h b/arch/arm/src/stm32/stm32_rtc.h
index 095b2f838e9..b90c2b11c3c 100644
--- a/arch/arm/src/stm32/stm32_rtc.h
+++ b/arch/arm/src/stm32/stm32_rtc.h
@@ -180,8 +180,8 @@ int stm32_rtc_cancelalarm(void);
  ****************************************************************************/
 
 #ifdef CONFIG_RTC_DRIVER
-struct rtc_lower_half_s;
-FAR struct rtc_lower_half_s *stm32_rtc_lowerhalf(void);
+struct rtc_lowerhalf_s;
+FAR struct rtc_lowerhalf_s *stm32_rtc_lowerhalf(void);
 #endif
 
 #undef EXTERN
diff --git a/arch/arm/src/stm32/stm32_rtc_lowerhalf.c b/arch/arm/src/stm32/stm32_rtc_lowerhalf.c
index 7d85d2d9d7b..1a7c1e27d3c 100644
--- a/arch/arm/src/stm32/stm32_rtc_lowerhalf.c
+++ b/arch/arm/src/stm32/stm32_rtc_lowerhalf.c
@@ -273,9 +273,9 @@ static int stm32_settime(FAR struct rtc_lowerhalf_s *lower,
  *
  ****************************************************************************/
 
-FAR struct rtc_lower_half_s *stm32_rtc_lowerhalf(void)
+FAR struct rtc_lowerhalf_s *stm32_rtc_lowerhalf(void)
 {
-  return (FAR struct rtc_lower_half_s *)&g_rtc_lowerhalf;
+  return (FAR struct rtc_lowerhalf_s *)&g_rtc_lowerhalf;
 }
 
 #endif /* CONFIG_RTC_DRIVER */