diff --git a/src/RageDisplay_D3D.cpp b/src/RageDisplay_D3D.cpp
index b5261343f3..52f8219456 100644
--- a/src/RageDisplay_D3D.cpp
+++ b/src/RageDisplay_D3D.cpp
@@ -1553,10 +1553,9 @@ void RageDisplay_D3D::SetSphereEnvironmentMapping( TextureUnit tu, bool b )
 	g_bSphereMapping[tu] = b;
 }
 
-void RageDisplay_D3D::SetCelShaded( bool b )
+void RageDisplay_D3D::SetCelShaded( int stage )
 {
-	/* AJ doesn't know how to deal with this and he's the only one of the
-	 * sm-ssc team who's touched DirectX in C++ (for all of an hour). */
+	// todo: implement me!
 }
 
 /*
diff --git a/src/RageDisplay_D3D.h b/src/RageDisplay_D3D.h
index f1bcbd5558..43a6e5e71f 100644
--- a/src/RageDisplay_D3D.h
+++ b/src/RageDisplay_D3D.h
@@ -64,7 +64,7 @@ public:
 		const RageVector3 &dir );
 
 	void SetSphereEnvironmentMapping( TextureUnit tu, bool b );
-	void SetCelShaded( bool b );
+	void SetCelShaded( int stage );
 
 	RageCompiledGeometry* CreateCompiledGeometry();
 	void DeleteCompiledGeometry( RageCompiledGeometry* p );