diff --git a/libc/kernel/common/linux/msm_audio.h b/libc/kernel/common/linux/msm_audio.h
index f314a82..58dc6f3 100644
--- a/libc/kernel/common/linux/msm_audio.h
+++ b/libc/kernel/common/linux/msm_audio.h
@@ -50,30 +50,32 @@
 #define SND_MUTE_UNMUTED 0
 #define SND_MUTE_MUTED 1
 
-struct snd_device_config {
+struct msm_snd_device_config {
  uint32_t device;
  uint32_t ear_mute;
  uint32_t mic_mute;
 };
 
-#define SND_SET_DEVICE _IOW(SND_IOCTL_MAGIC, 2, struct device_config *)
+#define SND_SET_DEVICE _IOW(SND_IOCTL_MAGIC, 2, struct msm_device_config *)
 
 #define SND_METHOD_VOICE 0
 
-struct snd_volume_config {
+struct msm_snd_volume_config {
  uint32_t device;
  uint32_t method;
  uint32_t volume;
 };
 
-#define SND_SET_VOLUME _IOW(SND_IOCTL_MAGIC, 3, struct snd_volume_config *)
+#define SND_SET_VOLUME _IOW(SND_IOCTL_MAGIC, 3, struct msm_snd_volume_config *)
 
-struct snd_endpoint {
- const char name[50];
+#define SND_GET_NUM_ENDPOINTS _IOR(SND_IOCTL_MAGIC, 4, unsigned *)
+
+struct msm_snd_endpoint {
  int id;
+ char name[64];
 };
 
-#define SND_GET_ENDPOINTS _IOR(SND_IOCTL_MAGIC, 4, struct snd_endpoint *) 
+#define SND_GET_ENDPOINT _IOWR(SND_IOCTL_MAGIC, 5, struct msm_snd_endpoint *)
 
 #endif