diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index a2104671f51d38df6eec99b3e0aa8ac570ea8988..5dcf88bed9b785e38dd01eecf5121f09e1d43255 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -1242,6 +1242,7 @@ int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_par
 		return -EINVAL;
 	return 0;
 }
+EXPORT_SYMBOL(snd_pcm_hw_constraint_mask64);
 
 /**
  * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval