diff --git a/arch/arm/src/stm32f7/Kconfig b/arch/arm/src/stm32f7/Kconfig
index 14260517fcf..e054d85f881 100644
--- a/arch/arm/src/stm32f7/Kconfig
+++ b/arch/arm/src/stm32f7/Kconfig
@@ -2589,7 +2589,7 @@ menu "RTC Configuration"
 config STM32F7_RTC_MAGIC_REG
 	int "BKP register"
 	default 0
-	range  0 31
+	range 0 31
 	---help---
 		The BKP register used to store/check the Magic value to determine if
 		RTC is already setup