diff --git a/sys/dev/sound/pcm/feeder.h b/sys/dev/sound/pcm/feeder.h
--- a/sys/dev/sound/pcm/feeder.h
+++ b/sys/dev/sound/pcm/feeder.h
@@ -70,7 +70,6 @@
     struct pcm_feederdesc *desc);
 void feeder_remove(struct pcm_channel *c);
 struct pcm_feeder *feeder_find(struct pcm_channel *c, u_int32_t type);
-void feeder_printchain(struct pcm_feeder *head);
 int feeder_chain(struct pcm_channel *);
 
 #define FEEDER_DECLARE(feeder, ctype)					\
diff --git a/sys/dev/sound/pcm/feeder.c b/sys/dev/sound/pcm/feeder.c
--- a/sys/dev/sound/pcm/feeder.c
+++ b/sys/dev/sound/pcm/feeder.c
@@ -318,22 +318,6 @@
 		return best2;
 }
 
-void
-feeder_printchain(struct pcm_feeder *head)
-{
-	struct pcm_feeder *f;
-
-	printf("feeder chain (head @%p)\n", head);
-	f = head;
-	while (f != NULL) {
-		printf("%s @ %p\n", f->class->name, f);
-		f = f->source;
-	}
-	printf("[end]\n\n");
-}
-
-/*****************************************************************************/
-
 static int
 feed_root(struct pcm_feeder *feeder, struct pcm_channel *ch, u_int8_t *buffer, u_int32_t count, void *source)
 {