diff --git a/reactos/dll/win32/wdmaud.drv/legacy.c b/reactos/dll/win32/wdmaud.drv/legacy.c
index 55189178572..90a00b4f8dc 100644
--- a/reactos/dll/win32/wdmaud.drv/legacy.c
+++ b/reactos/dll/win32/wdmaud.drv/legacy.c
@@ -250,7 +250,9 @@ WdmAudGetCapabilitiesByLegacy(
 }
 
 MMRESULT
-WdmAudOpenSoundDeviceByLegacy()
+WdmAudOpenSoundDeviceByLegacy(
+    IN PSOUND_DEVICE SoundDevice,
+    OUT PVOID *Handle)
 {
     /* Only open this if it's not already open */
     if ( KernelHandle == INVALID_HANDLE_VALUE )
diff --git a/reactos/dll/win32/wdmaud.drv/wdmaud.h b/reactos/dll/win32/wdmaud.drv/wdmaud.h
index ab3093b6251..1374cea1a98 100644
--- a/reactos/dll/win32/wdmaud.drv/wdmaud.h
+++ b/reactos/dll/win32/wdmaud.drv/wdmaud.h
@@ -26,9 +26,6 @@ WdmAudGetWaveInCount(VOID);
 ULONG
 WdmAudGetMixerCount(VOID);
 
-MMRESULT
-WdmAudOpenSoundDeviceByLegacy(VOID);
-
 MMRESULT
 WdmAudGetNumWdmDevsByMMixer(
     IN  MMDEVICE_TYPE DeviceType,
@@ -165,7 +162,10 @@ WdmAudGetCapabilitiesByLegacy(
     IN  DWORD CapabilitiesSize);
 
 MMRESULT
-WdmAudOpenSoundDeviceByLegacy(VOID);
+WdmAudOpenSoundDeviceByLegacy(
+    IN PSOUND_DEVICE SoundDevice,
+    OUT PVOID *Handle
+);
 
 MMRESULT
 WdmAudCloseSoundDeviceByLegacy(