diff --git a/src/core/hle/DSOUND/DirectSound/DirectSound.hpp b/src/core/hle/DSOUND/DirectSound/DirectSound.hpp
index e4d87f7ac..cce3bbcea 100644
--- a/src/core/hle/DSOUND/DirectSound/DirectSound.hpp
+++ b/src/core/hle/DSOUND/DirectSound/DirectSound.hpp
@@ -1420,7 +1420,7 @@ HRESULT WINAPI EMUPATCH(IDirectSoundBuffer_SetNotificationPositions)
 // ******************************************************************
 HRESULT WINAPI EMUPATCH(CDirectSoundStream_SetRolloffCurve)
 (
-    X_CDirectSoundBuffer*   pThis,
+    X_CDirectSoundStream*   pThis,
     const FLOAT*            pflPoints,
     DWORD                   dwPointCount,
     DWORD                   dwApply
diff --git a/src/core/hle/DSOUND/DirectSound/DirectSoundInline.hpp b/src/core/hle/DSOUND/DirectSound/DirectSoundInline.hpp
index 7435c0575..6c45375c6 100644
--- a/src/core/hle/DSOUND/DirectSound/DirectSoundInline.hpp
+++ b/src/core/hle/DSOUND/DirectSound/DirectSoundInline.hpp
@@ -1045,7 +1045,7 @@ static inline HRESULT HybridDirectSound3DListener_SetDopplerFactor(
     RETURN_RESULT_CHECK(hRet);
 }
 /*
-//TODO: PC DirectSound does not have SetHeadroom method function.
+//TODO: PC DirectSound does not have SetEG method function.
 //IDirectSoundStream
 //IDirectSoundBuffer
 static inline HRESULT HybridDirectSoundBuffer_SetEG(
@@ -1056,7 +1056,7 @@ static inline HRESULT HybridDirectSoundBuffer_SetEG(
     return DS_OK;
 }
 
-//TODO: PC DirectSound does not have SetHeadroom method function.
+//TODO: PC DirectSound does not have SetFilter method function.
 //IDirectSoundStream
 //IDirectSoundBuffer
 static inline HRESULT HybridDirectSoundBuffer_SetFilter(
diff --git a/src/core/hle/DSOUND/DirectSound/DirectSoundStream.cpp b/src/core/hle/DSOUND/DirectSound/DirectSoundStream.cpp
index cf5c0e953..2291875f6 100644
--- a/src/core/hle/DSOUND/DirectSound/DirectSoundStream.cpp
+++ b/src/core/hle/DSOUND/DirectSound/DirectSoundStream.cpp
@@ -1303,7 +1303,7 @@ HRESULT WINAPI XTL::EMUPATCH(CDirectSoundStream_SetPosition)
 // ******************************************************************
 HRESULT WINAPI XTL::EMUPATCH(CDirectSoundStream_SetRolloffCurve)
 (
-    X_CDirectSoundBuffer*   pThis,
+    X_CDirectSoundStream*   pThis,
     const FLOAT*            pflPoints,
     DWORD                   dwPointCount,
     DWORD                   dwApply)