diff --git a/audio_amplifier/audio_amplifier.c b/audio_amplifier/audio_amplifier.c
index f9d51f2..b19641f 100644
--- a/audio_amplifier/audio_amplifier.c
+++ b/audio_amplifier/audio_amplifier.c
@@ -90,6 +90,7 @@ int tfa98xx_start_feedback(void* adev, uint32_t snd_device) {
     tfa_dev->usecase_tx->id = USECASE_AUDIO_SPKR_CALIB_TX;
     tfa_dev->usecase_tx->type = PCM_CAPTURE;
     tfa_dev->usecase_tx->in_snd_device = SND_DEVICE_IN_CAPTURE_VI_FEEDBACK;
+    list_init(&tfa_dev->usecase_tx->device_list);
 
     list_add_tail(&tfa_dev->adev->usecase_list, &tfa_dev->usecase_tx->list);
     enable_snd_device(tfa_dev->adev, tfa_dev->usecase_tx->in_snd_device);