diff --git a/mingw-w64-headers/include/audioclient.h b/mingw-w64-headers/include/audioclient.h
index 81f0ab9..025db07 100644
--- a/mingw-w64-headers/include/audioclient.h
+++ b/mingw-w64-headers/include/audioclient.h
@@ -138,6 +138,12 @@
     AUDCLNT_BUFFERFLAGS_SILENT = 0x2,
     AUDCLNT_BUFFERFLAGS_TIMESTAMP_ERROR = 0x4
 };
+typedef enum AUDCLNT_STREAMOPTIONS {
+    AUDCLNT_STREAMOPTIONS_NONE = 0x0,
+    AUDCLNT_STREAMOPTIONS_RAW = 0x1,
+    AUDCLNT_STREAMOPTIONS_MATCH_FORMAT = 0x2,
+    AUDCLNT_STREAMOPTIONS_AMBISONICS = 0x4
+} AUDCLNT_STREAMOPTIONS;
 
 typedef struct AudioClientProperties {
     UINT32 cbSize;
diff --git a/mingw-w64-headers/include/audioclient.idl b/mingw-w64-headers/include/audioclient.idl
index 2843344..ab55440 100644
--- a/mingw-w64-headers/include/audioclient.idl
+++ b/mingw-w64-headers/include/audioclient.idl
@@ -60,6 +60,13 @@
  AUDCLNT_BUFFERFLAGS_TIMESTAMP_ERROR = 0x4
 };
 
+typedef enum AUDCLNT_STREAMOPTIONS {
+  AUDCLNT_STREAMOPTIONS_NONE = 0x0,
+  AUDCLNT_STREAMOPTIONS_RAW = 0x1,
+  AUDCLNT_STREAMOPTIONS_MATCH_FORMAT = 0x2,
+  AUDCLNT_STREAMOPTIONS_AMBISONICS = 0x4
+} AUDCLNT_STREAMOPTIONS;
+
 cpp_quote("")
 typedef struct AudioClientProperties {
   UINT32 cbSize;