diff --git a/dlls/dsound/buffer.c b/dlls/dsound/buffer.c
index 35cb2c39dd..47de64594f 100644
--- a/dlls/dsound/buffer.c
+++ b/dlls/dsound/buffer.c
@@ -886,7 +886,7 @@ static HRESULT WINAPI IDirectSoundBufferImpl_GetObjectInPath(
 }
 
 static HRESULT WINAPI IDirectSoundBufferImpl_Initialize(
-	LPDIRECTSOUNDBUFFER8 iface,LPDIRECTSOUND8 dsound,LPCDSBUFFERDESC dbsd
+	LPDIRECTSOUNDBUFFER8 iface,LPDIRECTSOUND dsound,LPCDSBUFFERDESC dbsd
 ) {
 	ICOM_THIS(IDirectSoundBufferImpl,iface);
 	FIXME("(%p,%p,%p):stub\n",This,dsound,dbsd);
@@ -1325,7 +1325,7 @@ static HRESULT WINAPI SecondaryBufferImpl_GetStatus(
 }
 
 static HRESULT WINAPI SecondaryBufferImpl_Initialize(
-	LPDIRECTSOUNDBUFFER8 iface,LPDIRECTSOUND8 dsound,LPCDSBUFFERDESC dbsd)
+	LPDIRECTSOUNDBUFFER8 iface,LPDIRECTSOUND dsound,LPCDSBUFFERDESC dbsd)
 {
 	ICOM_THIS(SecondaryBufferImpl,iface);
 	TRACE("(%p,%p,%p)\n",This,dsound,dbsd);
diff --git a/dlls/dsound/primary.c b/dlls/dsound/primary.c
index 2dce6908a9..cb481deccf 100644
--- a/dlls/dsound/primary.c
+++ b/dlls/dsound/primary.c
@@ -932,7 +932,7 @@ static HRESULT WINAPI PrimaryBufferImpl_GetObjectInPath(
 }
 
 static HRESULT WINAPI PrimaryBufferImpl_Initialize(
-	LPDIRECTSOUNDBUFFER8 iface,LPDIRECTSOUND8 dsound,LPCDSBUFFERDESC dbsd
+	LPDIRECTSOUNDBUFFER8 iface,LPDIRECTSOUND dsound,LPCDSBUFFERDESC dbsd
 ) {
 	ICOM_THIS(PrimaryBufferImpl,iface);
 	FIXME("(%p,%p,%p):stub\n",This,dsound,dbsd);
diff --git a/include/dsound.h b/include/dsound.h
index 1550e609e4..4bd3763530 100644
--- a/include/dsound.h
+++ b/include/dsound.h
@@ -554,7 +554,7 @@ ICOM_DEFINE(IDirectSoundBuffer,IUnknown)
     STDMETHOD(GetPan)(THIS_ LPLONG lplpan) PURE; \
     STDMETHOD(GetFrequency)(THIS_ LPDWORD lpdwFrequency) PURE; \
     STDMETHOD(GetStatus)(THIS_ LPDWORD lpdwStatus) PURE; \
-    STDMETHOD(Initialize)(THIS_ LPDIRECTSOUND8 lpDirectSound, LPCDSBUFFERDESC lpcDSBufferDesc) PURE; \
+    STDMETHOD(Initialize)(THIS_ LPDIRECTSOUND lpDirectSound, LPCDSBUFFERDESC lpcDSBufferDesc) PURE; \
     STDMETHOD(Lock)(THIS_ DWORD dwWriteCursor, DWORD dwWriteBytes, LPVOID lplpvAudioPtr1, LPDWORD lpdwAudioBytes1, LPVOID lplpvAudioPtr2, LPDWORD lpdwAudioBytes2, DWORD dwFlags) PURE; \
     STDMETHOD(Play)(THIS_ DWORD dwReserved1, DWORD dwReserved2, DWORD dwFlags) PURE; \
     STDMETHOD(SetCurrentPosition)(THIS_ DWORD dwNewPosition) PURE; \