diff --git a/stepmania/src/RageDisplay.cpp b/stepmania/src/RageDisplay.cpp
index 2ca24bb60d..a6fcb4a64c 100644
--- a/stepmania/src/RageDisplay.cpp
+++ b/stepmania/src/RageDisplay.cpp
@@ -585,12 +585,12 @@ void RageDisplay::FlushQueue()
 	m_iDrawsSinceLastCheck++;
 }
 
-void RageDisplay::SetViewTransform( D3DXMATRIX* pMatrix )
+void RageDisplay::SetViewTransform( const D3DXMATRIX* pMatrix )
 {
 	FlushQueue();
 	m_pd3dDevice->SetTransform( D3DTS_VIEW, pMatrix );
 }
-void RageDisplay::SetProjectionTransform( D3DXMATRIX* pMatrix )
+void RageDisplay::SetProjectionTransform( const D3DXMATRIX* pMatrix )
 {
 	FlushQueue();
 	m_pd3dDevice->SetTransform( D3DTS_PROJECTION, pMatrix );
diff --git a/stepmania/src/RageDisplay.h b/stepmania/src/RageDisplay.h
index 702a417351..f4a80d93b0 100644
--- a/stepmania/src/RageDisplay.h
+++ b/stepmania/src/RageDisplay.h
@@ -88,8 +88,8 @@ public:
 
 	
 //	LPDIRECT3DVERTEXBUFFER8 GetVertexBuffer() { return m_pVB; };
-	void SetViewTransform( D3DXMATRIX* pMatrix );
-	void SetProjectionTransform( D3DXMATRIX* pMatrix );
+	void SetViewTransform( const D3DXMATRIX* pMatrix );
+	void SetProjectionTransform( const D3DXMATRIX* pMatrix );
 	void GetViewTransform( D3DXMATRIX* pMatrixOut );
 	void GetProjectionTransform( D3DXMATRIX* pMatrixOut );