diff --git a/ports/stm32/stm32_it.c b/ports/stm32/stm32_it.c
index dc96e2dd6c..4dde201a2f 100644
--- a/ports/stm32/stm32_it.c
+++ b/ports/stm32/stm32_it.c
@@ -625,7 +625,7 @@ void TIM1_TRG_COM_TIM11_IRQHandler(void) {
     IRQ_EXIT(TIM1_TRG_COM_TIM11_IRQn);
 }
 
-#if defined(STM32L4)
+#if defined(STM32L4) || defined(STM32WB)
 void TIM1_TRG_COM_TIM17_IRQHandler(void) {
     IRQ_ENTER(TIM1_TRG_COM_TIM17_IRQn);
     timer_irq_handler(17);