Index: uspace/lib/drv/include/audio_mixer_iface.h
===================================================================
--- uspace/lib/drv/include/audio_mixer_iface.h	(revision 09d13c8e567316acfec91989df4a5d961f8fb644)
+++ uspace/lib/drv/include/audio_mixer_iface.h	(revision c832ab151a0d83cc975d80fd2f1087d450a76d62)
@@ -43,7 +43,7 @@
 #include "ddf/driver.h"
 
-errno_t audio_mixer_get_info(async_exch_t *, const char **, unsigned *);
+errno_t audio_mixer_get_info(async_exch_t *, char **, unsigned *);
 errno_t audio_mixer_get_item_info(async_exch_t *, unsigned,
-    const char **, unsigned *);
+    char **, unsigned *);
 errno_t audio_mixer_get_item_level(async_exch_t *, unsigned, unsigned *);
 errno_t audio_mixer_set_item_level(async_exch_t *, unsigned, unsigned);
Index: uspace/lib/drv/include/audio_pcm_iface.h
===================================================================
--- uspace/lib/drv/include/audio_pcm_iface.h	(revision 09d13c8e567316acfec91989df4a5d961f8fb644)
+++ uspace/lib/drv/include/audio_pcm_iface.h	(revision c832ab151a0d83cc975d80fd2f1087d450a76d62)
@@ -80,5 +80,5 @@
 void audio_pcm_close(audio_pcm_sess_t *);
 
-errno_t audio_pcm_get_info_str(audio_pcm_sess_t *, const char **);
+errno_t audio_pcm_get_info_str(audio_pcm_sess_t *, char **);
 errno_t audio_pcm_test_format(audio_pcm_sess_t *, unsigned *, unsigned *,
     pcm_sample_format_t *);