diff --git a/stepmania/src/ActorFrame.cpp b/stepmania/src/ActorFrame.cpp
index 573e9d2073..181553dc1e 100644
--- a/stepmania/src/ActorFrame.cpp
+++ b/stepmania/src/ActorFrame.cpp
@@ -52,12 +52,12 @@ void ActorFrame::LoadFromNode( const CString& sDir, const XNode* pNode )
 	CString s;
 	if( pNode->GetAttrValue( "VanishX", s ) )
 	{
-		LUA->PrepareExpression( s );
+		LuaHelpers::PrepareExpression( s );
 		m_fVanishX = LuaHelpers::RunExpressionF( s );
 	}
 	if( pNode->GetAttrValue( "VanishY", s ) )
 	{
-		LUA->PrepareExpression( s );
+		LuaHelpers::PrepareExpression( s );
 		m_fVanishY = LuaHelpers::RunExpressionF( s );
 	}
 	m_bOverrideLighting = pNode->GetAttrValue( "Lighting", m_bLighting );
diff --git a/stepmania/src/Command.cpp b/stepmania/src/Command.cpp
index 7f5fab5dd5..484a8b2f20 100644
--- a/stepmania/src/Command.cpp
+++ b/stepmania/src/Command.cpp
@@ -40,19 +40,19 @@ Command::Arg::operator CString ()
 
 Command::Arg::operator float ()
 {
-	LUA->PrepareExpression( s );	// strip invalid chars
+	LuaHelpers::PrepareExpression( s );	// strip invalid chars
 	return LuaHelpers::RunExpressionF( s );
 }
 
 Command::Arg::operator int ()
 {
-	LUA->PrepareExpression( s );	// strip invalid chars
+	LuaHelpers::PrepareExpression( s );	// strip invalid chars
 	return (int) LuaHelpers::RunExpressionF( s );
 }
 
 Command::Arg::operator bool ()
 {
-	LUA->PrepareExpression( s );	// strip invalid chars
+	LuaHelpers::PrepareExpression( s );	// strip invalid chars
 	return LuaHelpers::RunExpressionF( s ) != 0.0f;
 }
 
diff --git a/stepmania/src/LuaManager.cpp b/stepmania/src/LuaManager.cpp
index f2b6567538..c74129917c 100644
--- a/stepmania/src/LuaManager.cpp
+++ b/stepmania/src/LuaManager.cpp
@@ -227,7 +227,7 @@ void LuaManager::ResetState()
 	m_pLock->Unlock();
 }
 
-void LuaManager::PrepareExpression( CString &sInOut )
+void LuaHelpers::PrepareExpression( CString &sInOut )
 {
 	// HACK: Many metrics have "//" comments that Lua fails to parse.
 	// Replace them with Lua-style comments.
diff --git a/stepmania/src/LuaManager.h b/stepmania/src/LuaManager.h
index adb17124c1..83eddfa752 100644
--- a/stepmania/src/LuaManager.h
+++ b/stepmania/src/LuaManager.h
@@ -54,8 +54,6 @@ public:
 	Lua *Get();
 	void Release( Lua *&p );
 
-	void PrepareExpression( CString &sInOut );	// strip "//" comments and "+"
-
 	/* Reset the environment, freeing any globals left over by previously executed scripts. */
 	void ResetState();
 
@@ -86,6 +84,9 @@ namespace LuaHelpers
 
 	bool RunScriptFile( const CString &sFile );
 
+	/* Strip "//" comments and "+". */
+	void PrepareExpression( CString &sInOut );
+
 	/* Create a Lua array (a table with indices starting at 1) of the given vector,
 	 * and push it on the stack. */
 	void CreateTableFromArrayB( Lua *L, const vector<bool> &aIn );
diff --git a/stepmania/src/ThemeManager.cpp b/stepmania/src/ThemeManager.cpp
index c874e9f46e..ca47ac2d95 100644
--- a/stepmania/src/ThemeManager.cpp
+++ b/stepmania/src/ThemeManager.cpp
@@ -717,7 +717,7 @@ float ThemeManager::GetMetricF( const CString &sClassName, const CString &sValue
 {
 	CString sValue = GetMetric( sClassName, sValueName );	// Use non-raw so that Lua expressions are allowed
 
-	LUA->PrepareExpression( sValue );
+	LuaHelpers::PrepareExpression( sValue );
 
 	return LuaHelpers::RunExpressionF( sValue );
 }
@@ -737,7 +737,7 @@ bool ThemeManager::GetMetricB( const CString &sClassName, const CString &sValueN
 	if( sValue.Left(1) == "1" )
 		return true; /* optimization */
 
-	LUA->PrepareExpression( sValue );
+	LuaHelpers::PrepareExpression( sValue );
 	
 	return LuaHelpers::RunExpressionB( sValue );
 }