diff --git a/stepmania/src/ActorScroller.cpp b/stepmania/src/ActorScroller.cpp
index 2d432bd102..349975564a 100644
--- a/stepmania/src/ActorScroller.cpp
+++ b/stepmania/src/ActorScroller.cpp
@@ -52,10 +52,10 @@ void ActorScroller::Load2()
 	LUA->Release( L );
 }
 
-void ActorScroller::SetTransformFromExpression( const RString &sTransformFunction )
+void ActorScroller::SetTransformFromReference( const LuaReference &ref )
 {
-	m_exprTransformFunction.SetFromExpression( sTransformFunction );
-	
+	m_exprTransformFunction.SetFromReference( ref );
+
 	// Probe to find which of the parameters are used.
 #define GP(a,b)	m_exprTransformFunction.GetPosition( a, b, 2 )
 	m_bFunctionDependsOnPositionOffset = (GP(0,0) != GP(1,0)) && (GP(0,1) != GP(1,1));
@@ -63,6 +63,12 @@ void ActorScroller::SetTransformFromExpression( const RString &sTransformFunctio
 	m_exprTransformFunction.ClearCache();
 }
 
+void ActorScroller::SetTransformFromExpression( const RString &sTransformFunction )
+{
+	LuaReference ref;
+	ref.SetFromExpression( sTransformFunction );
+}
+
 void ActorScroller::SetTransformFromHeight( float fItemHeight )
 {
 	SetTransformFromExpression( ssprintf("function(self,offset,itemIndex,numItems) self:y(%f*offset) end",fItemHeight) );
diff --git a/stepmania/src/ActorScroller.h b/stepmania/src/ActorScroller.h
index 609cdfaa84..775bfaa81a 100644
--- a/stepmania/src/ActorScroller.h
+++ b/stepmania/src/ActorScroller.h
@@ -13,6 +13,7 @@ class ActorScroller : public ActorFrame
 public:
 	ActorScroller();
 
+	void SetTransformFromReference( const LuaReference &ref );
 	void SetTransformFromExpression( const RString &sTransformFunction );
 	void SetTransformFromHeight( float fItemHeight );