diff --git a/miniaudio.h b/miniaudio.h
index 198567a1..f63472b1 100644
--- a/miniaudio.h
+++ b/miniaudio.h
@@ -10961,13 +10961,17 @@ typedef struct ma_sound  ma_sound;
 /* Sound flags. */
 typedef enum
 {
+    /* Resource manager flags. */
     MA_SOUND_FLAG_STREAM                = 0x00000001,   /* MA_RESOURCE_MANAGER_DATA_SOURCE_FLAG_STREAM */
     MA_SOUND_FLAG_DECODE                = 0x00000002,   /* MA_RESOURCE_MANAGER_DATA_SOURCE_FLAG_DECODE */
     MA_SOUND_FLAG_ASYNC                 = 0x00000004,   /* MA_RESOURCE_MANAGER_DATA_SOURCE_FLAG_ASYNC */
     MA_SOUND_FLAG_WAIT_INIT             = 0x00000008,   /* MA_RESOURCE_MANAGER_DATA_SOURCE_FLAG_WAIT_INIT */
-    MA_SOUND_FLAG_NO_DEFAULT_ATTACHMENT = 0x00000010,   /* Do not attach to the endpoint by default. Useful for when setting up nodes in a complex graph system. */
-    MA_SOUND_FLAG_NO_PITCH              = 0x00000020,   /* Disable pitch shifting with ma_sound_set_pitch() and ma_sound_group_set_pitch(). This is an optimization. */
-    MA_SOUND_FLAG_NO_SPATIALIZATION     = 0x00000040    /* Disable spatialization. */
+    MA_SOUND_FLAG_UNKNOWN_LENGTH        = 0x00000010,   /* MA_RESOURCE_MANAGER_DATA_SOURCE_FLAG_UNKNOWN_LENGTH */
+
+    /* ma_sound specific flags. */
+    MA_SOUND_FLAG_NO_DEFAULT_ATTACHMENT = 0x00001000,   /* Do not attach to the endpoint by default. Useful for when setting up nodes in a complex graph system. */
+    MA_SOUND_FLAG_NO_PITCH              = 0x00002000,   /* Disable pitch shifting with ma_sound_set_pitch() and ma_sound_group_set_pitch(). This is an optimization. */
+    MA_SOUND_FLAG_NO_SPATIALIZATION     = 0x00004000    /* Disable spatialization. */
 } ma_sound_flags;
 
 #ifndef MA_ENGINE_MAX_LISTENERS