diff --git a/ports/stm32/adc.c b/ports/stm32/adc.c
index ba09c612d7cf..fc966e822ddf 100644
--- a/ports/stm32/adc.c
+++ b/ports/stm32/adc.c
@@ -170,6 +170,7 @@
     defined(STM32L451xx) || defined(STM32L452xx) || \
     defined(STM32L462xx) || defined(STM32L475xx) || \
     defined(STM32L476xx) || defined(STM32L496xx) || \
+    defined(STM32L4A6xx) || \
     defined(STM32WB55xx)
 #define VBAT_DIV (3)
 #elif defined(STM32L152xE)