diff --git a/sound/soc/xtensa/xtfpga-i2s.c b/sound/soc/xtensa/xtfpga-i2s.c
index 039f65e36fa8..8382ffa3bcaf 100644
--- a/sound/soc/xtensa/xtfpga-i2s.c
+++ b/sound/soc/xtensa/xtfpga-i2s.c
@@ -75,7 +75,7 @@ struct xtfpga_i2s {
 	 * stream in the pcm_close callback it synchronizes with the interrupt
 	 * handler by means of synchronize_rcu call.
 	 */
-	struct snd_pcm_substream *tx_substream;
+	struct snd_pcm_substream __rcu *tx_substream;
 	unsigned (*tx_fn)(struct xtfpga_i2s *i2s,
 			  struct snd_pcm_runtime *runtime,
 			  unsigned tx_ptr);