diff --git a/sound/pci/es1968.c b/sound/pci/es1968.c
index dc84c18..8130a87 100644
--- a/sound/pci/es1968.c
+++ b/sound/pci/es1968.c
@@ -1617,6 +1617,8 @@ #if 0
 	snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
 				   1024);
 #endif
+	snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES);
+
 	spin_lock_irq(&chip->substream_lock);
 	list_add(&es->list, &chip->substream_list);
 	spin_unlock_irq(&chip->substream_lock);