diff --git a/audio/audio.c b/audio/audio.c
index d8a5454827..1fa63ee042 100644
--- a/audio/audio.c
+++ b/audio/audio.c
@@ -1990,7 +1990,7 @@ void AUD_set_volume_in(SWVoiceIn *sw, Volume *vol)
     }
 }
 
-void audio_create_pdos(Audiodev *dev)
+static void audio_create_pdos(Audiodev *dev)
 {
     switch (dev->driver) {
 #define CASE(DRIVER, driver, pdo_name)                              \
diff --git a/audio/audio_int.h b/audio/audio_int.h
index 08d07b1755..e1f9fa333b 100644
--- a/audio/audio_int.h
+++ b/audio/audio_int.h
@@ -306,7 +306,6 @@ static inline size_t audio_ring_posb(size_t pos, size_t dist, size_t len)
 #define ldebug(fmt, ...) (void)0
 #endif
 
-void audio_create_pdos(Audiodev *dev);
 AudiodevPerDirectionOptions *audio_get_pdo_in(Audiodev *dev);
 AudiodevPerDirectionOptions *audio_get_pdo_out(Audiodev *dev);