diff --git a/multi/stm32l4-multi/pwm_n6.c b/multi/stm32l4-multi/pwm_n6.c
index c38d9438..d12d894a 100644
--- a/multi/stm32l4-multi/pwm_n6.c
+++ b/multi/stm32l4-multi/pwm_n6.c
@@ -670,6 +670,9 @@ int pwm_setBitSequence(pwm_tim_id_t timer, pwm_ch_id_t chn, void *data, uint32_t
 	if (nbits > MAX_DSHOT_DMA) {
 		return -EINVAL;
 	}
+	if (((PWM_TIM_DMA >> timer) & 1) == 0) {
+		return -EINVAL;
+	}
 
 	mutexLock(pwm_common.dmalock);
 
diff --git a/multi/stm32l4-multi/pwm_n6.h b/multi/stm32l4-multi/pwm_n6.h
index 601ba750..49612d66 100644
--- a/multi/stm32l4-multi/pwm_n6.h
+++ b/multi/stm32l4-multi/pwm_n6.h
@@ -55,6 +55,7 @@
 #define PWM_TIM_GP2             ((1 << pwm_tim9) | (1 << pwm_tim12) | (1 << pwm_tim15))
 #define PWM_TIM_NO_MASTER_SLAVE ((1 << pwm_tim10) | (1 << pwm_tim11) | (1 << pwm_tim13) | (1 << pwm_tim14) | (1 << pwm_tim16) | (1 << pwm_tim17))
 #define PWM_TIM_32BIT           ((1 << pwm_tim2) | (1 << pwm_tim3) | (1 << pwm_tim4) | (1 << pwm_tim5))
+#define PWM_TIM_DMA             ((1 << pwm_tim1) | (1 << pwm_tim2) | (1 << pwm_tim3) | (1 << pwm_tim4) | (1 << pwm_tim5) | (1 << pwm_tim8) | (1 << pwm_tim15) | (1 << pwm_tim16) | (1 << pwm_tim17))
 
 
 /* Get the base clock frequency for a given timer. Returns 0 upon error. */