diff --git a/libc/kernel/uapi/sound/asound.h b/libc/kernel/uapi/sound/asound.h
index ef3c311..441f1d4 100644
--- a/libc/kernel/uapi/sound/asound.h
+++ b/libc/kernel/uapi/sound/asound.h
@@ -234,6 +234,7 @@
 #define SNDRV_PCM_INFO_HAS_LINK_ABSOLUTE_ATIME 0x02000000
 #define SNDRV_PCM_INFO_HAS_LINK_ESTIMATED_ATIME 0x04000000
 #define SNDRV_PCM_INFO_HAS_LINK_SYNCHRONIZED_ATIME 0x08000000
+#define SNDRV_PCM_INFO_EXPLICIT_SYNC 0x10000000
 #define SNDRV_PCM_INFO_DRAIN_TRIGGER 0x40000000
 #define SNDRV_PCM_INFO_FIFO_IN_FRAMES 0x80000000
 #if __BITS_PER_LONG == 32 && defined(__USE_TIME_BITS64)
@@ -621,6 +622,7 @@
 };
 #define SNDRV_RAWMIDI_IOCTL_PVERSION _IOR('W', 0x00, int)
 #define SNDRV_RAWMIDI_IOCTL_INFO _IOR('W', 0x01, struct snd_rawmidi_info)
+#define SNDRV_RAWMIDI_IOCTL_USER_PVERSION _IOW('W', 0x02, int)
 #define SNDRV_RAWMIDI_IOCTL_PARAMS _IOWR('W', 0x10, struct snd_rawmidi_params)
 #define SNDRV_RAWMIDI_IOCTL_STATUS _IOWR('W', 0x20, struct snd_rawmidi_status)
 #define SNDRV_RAWMIDI_IOCTL_DROP _IOW('W', 0x30, int)