diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index e9ab45556afa..df70e7592ab5 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -898,7 +898,6 @@ ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
 const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
 int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
 snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
-const char *snd_pcm_format_name(snd_pcm_format_t format);
 
 void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops);
 void snd_pcm_set_sync(struct snd_pcm_substream *substream);
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index 5d7eb123b999..122e10a61ab9 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -196,7 +196,7 @@ static char *snd_pcm_format_names[] = {
 	FORMAT(U18_3BE),
 };
 
-const char *snd_pcm_format_name(snd_pcm_format_t format)
+static const char *snd_pcm_format_name(snd_pcm_format_t format)
 {
 	return snd_pcm_format_names[format];
 }