diff --git a/os/hal/ports/STM32/STM32L4xx/platform_l432.mk b/os/hal/ports/STM32/STM32L4xx/platform_l432.mk
index ba67f9959..960c70fa1 100644
--- a/os/hal/ports/STM32/STM32L4xx/platform_l432.mk
+++ b/os/hal/ports/STM32/STM32L4xx/platform_l432.mk
@@ -1,7 +1,8 @@
 # Required platform files.
 PLATFORMSRC := $(CHIBIOS)/os/hal/ports/common/ARMCMx/nvic.c \
                $(CHIBIOS)/os/hal/ports/STM32/STM32L4xx/stm32_isr.c \
-               $(CHIBIOS)/os/hal/ports/STM32/STM32L4xx/hal_lld.c
+               $(CHIBIOS)/os/hal/ports/STM32/STM32L4xx/hal_lld.c \
+               $(CHIBIOS)/os/hal/ports/STM32/STM32L4xx/hal_efl_lld.c
 
 # Required include directories.
 PLATFORMINC := $(CHIBIOS)/os/hal/ports/common/ARMCMx \