diff --git a/marlin_changes/HAL_stm32.c b/marlin_changes/HAL_stm32.c
index d49893b..1d24fe4 100644
--- a/marlin_changes/HAL_stm32.c
+++ b/marlin_changes/HAL_stm32.c
@@ -482,6 +482,7 @@ int HAL_tim15_init(void)
     TIM15->PSC = (TIM15_PRESCALE -1);
     TIM15->CCMR1 |= (TIM_CCMR1_OC2M_2 | TIM_CCMR1_OC2M_1 | TIM_CCMR1_OC2PE);
     TIM15->CCER |= TIM_CCER_CC2E;
+    TIM15->BDTR |= TIM_BDTR_MOE;
     TIM15->CCR2 = 0;  // pwm off
     TIM15->CR1 |= (TIM_CR1_ARPE | TIM_CR1_CMS_0 | TIM_CR1_CEN);
     TIM15->EGR |= TIM_EGR_UG;