problems in NuttX/arch/arm/src/stm32f7/Make.defs

Line 141
ifeq ($(filter y,$(CONFIG_STM32F7_IWDG) $(CONFIG_STM32F7_RTC_LSICLOCK)),y)
CHIP_CSRCS += stm32_lsi.c
endif

stm32_lsi.c will NOT be compiled if both CONFIG_STM32F7_IWDG and CONFIG_STM32F7_RTC_LSICLOCK equals to y
Could you please check it? 
Thanks