diff --git a/stepmania/src/GameDef.cpp b/stepmania/src/GameDef.cpp
index 8da1b1b24b..bea694a0fb 100644
--- a/stepmania/src/GameDef.cpp
+++ b/stepmania/src/GameDef.cpp
@@ -21,7 +21,7 @@
 #include "PrefsManager.h"
 
 
-CString GameDef::ElementToGraphicSuffix( const SkinElement gbg ) 
+CString GameDef::ElementToGraphicSuffix( const SkinElement gbg ) const
 {
 	CString sAssetPath;		// fill this in below
 
@@ -41,7 +41,7 @@ CString GameDef::ElementToGraphicSuffix( const SkinElement gbg )
 	return sAssetPath;
 }
 
-CString GameDef::GetPathToGraphic( const CString sSkinName, const CString sButtonName, const SkinElement gbg ) 
+CString GameDef::GetPathToGraphic( const CString sSkinName, const CString sButtonName, const SkinElement gbg ) const
 {
 	const CString sSkinDir	= ssprintf("Skins\\%s\\%s\\", m_szName, sSkinName);
 	const CString sGraphicSuffix = ElementToGraphicSuffix( gbg );
@@ -61,7 +61,7 @@ CString GameDef::GetPathToGraphic( const CString sSkinName, const CString sButto
 	return "";
 }
 
-void GameDef::GetTapTweenColors( const CString sSkinName, const CString sButtonName, CArray<D3DXCOLOR,D3DXCOLOR> &aTapColorsOut )
+void GameDef::GetTapTweenColors( const CString sSkinName, const CString sButtonName, CArray<D3DXCOLOR,D3DXCOLOR> &aTapColorsOut ) const
 {
 	const CString sSkinDir	= ssprintf("Skins\\%s\\%s\\", m_szName, sSkinName);
 
@@ -94,7 +94,7 @@ void GameDef::GetTapTweenColors( const CString sSkinName, const CString sButtonN
 	return;
 }
 
-void GameDef::GetHoldTweenColors( const CString sSkinName, const CString sButtonName, CArray<D3DXCOLOR,D3DXCOLOR> &aHoldColorsOut )
+void GameDef::GetHoldTweenColors( const CString sSkinName, const CString sButtonName, CArray<D3DXCOLOR,D3DXCOLOR> &aHoldColorsOut ) const
 {
 	const CString sSkinDir	= ssprintf("Skins\\%s\\%s\\", m_szName, sSkinName);
 
diff --git a/stepmania/src/GameDef.h b/stepmania/src/GameDef.h
index 76607df3c1..551f6c2521 100644
--- a/stepmania/src/GameDef.h
+++ b/stepmania/src/GameDef.h
@@ -82,8 +82,8 @@ public:
 	void AssertSkinsAreComplete();
 	void AssertSkinIsComplete( CString sSkin );
 
-	CString GetPathToGraphic( const CString sSkinName, const CString sButtonName, const SkinElement gbg );
-	void	GetTapTweenColors( const CString sSkinName, const CString sButtonName, CArray<D3DXCOLOR,D3DXCOLOR> &aTapTweenColorsAddTo );
-	void	GetHoldTweenColors( const CString sSkinName, const CString sButtonName, CArray<D3DXCOLOR,D3DXCOLOR> &aHoldTweenColorsAddTo );
-	CString ElementToGraphicSuffix( const SkinElement gbg );
+	CString GetPathToGraphic( const CString sSkinName, const CString sButtonName, const SkinElement gbg ) const;
+	void	GetTapTweenColors( const CString sSkinName, const CString sButtonName, CArray<D3DXCOLOR,D3DXCOLOR> &aTapTweenColorsAddTo ) const;
+	void	GetHoldTweenColors( const CString sSkinName, const CString sButtonName, CArray<D3DXCOLOR,D3DXCOLOR> &aHoldTweenColorsAddTo ) const;
+	CString ElementToGraphicSuffix( const SkinElement gbg ) const;
 };