diff --git a/sys/dev/sound/pcm/feeder_fmt.c b/sys/dev/sound/pcm/feeder_fmt.c
index 8698178e52e6..9fcf2604f46d 100644
--- a/sys/dev/sound/pcm/feeder_fmt.c
+++ b/sys/dev/sound/pcm/feeder_fmt.c
@@ -23,7 +23,9 @@
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
- *
+ */
+
+/*
  * *New* and rewritten soft format converter, supporting 24/32bit pcm data,
  * simplified and optimized.
  *
diff --git a/sys/dev/sound/pcm/feeder_rate.c b/sys/dev/sound/pcm/feeder_rate.c
index e38924ba0821..14cca5537aa3 100644
--- a/sys/dev/sound/pcm/feeder_rate.c
+++ b/sys/dev/sound/pcm/feeder_rate.c
@@ -24,7 +24,9 @@
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
- *
+ */
+
+/*
  * 2006-02-21:
  * ==========
  *
diff --git a/sys/dev/sound/pcm/feeder_volume.c b/sys/dev/sound/pcm/feeder_volume.c
index 0f9d4264bd3b..b7392ddf5ce5 100644
--- a/sys/dev/sound/pcm/feeder_volume.c
+++ b/sys/dev/sound/pcm/feeder_volume.c
@@ -22,10 +22,10 @@
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
- *
- * feeder_volume, a long 'Lost Technology' rather than a new feature.
  */
 
+/* feeder_volume, a long 'Lost Technology' rather than a new feature. */
+
 #include <dev/sound/pcm/sound.h>
 #include "feeder_if.h"
 
diff --git a/sys/dev/sound/pcm/vchan.c b/sys/dev/sound/pcm/vchan.c
index d4a53563c5fb..8e7c86513d89 100644
--- a/sys/dev/sound/pcm/vchan.c
+++ b/sys/dev/sound/pcm/vchan.c
@@ -23,11 +23,10 @@
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
- *
- * Almost entirely rewritten to add multi-format/channels mixing support.
- *
  */
 
+/* Almost entirely rewritten to add multi-format/channels mixing support. */
+
 #include <dev/sound/pcm/sound.h>
 #include <dev/sound/pcm/vchan.h>
 #include "feeder_if.h"