diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index d6361dab..7a7f728 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -910,6 +910,7 @@
  * Returns 1 if the given PCM format is CPU-endian, 0 if
  * opposite, or a negative error code if endian not specified.
  */
+int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
 #ifdef SNDRV_LITTLE_ENDIAN
 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
 #else