diff --git a/stepmania/src/ActorFrame.cpp b/stepmania/src/ActorFrame.cpp
index b2d3a3b42b..c9721c0173 100644
--- a/stepmania/src/ActorFrame.cpp
+++ b/stepmania/src/ActorFrame.cpp
@@ -228,6 +228,18 @@ void ActorFrame::UpdateInternal( float fDeltaTime )
 	}
 }
 
+void ActorFrame::ProcessMessages( float fDeltaTime )
+{
+	Actor::ProcessMessages( fDeltaTime );
+
+	// update all sub-Actors
+	for( vector<Actor*>::iterator it=m_SubActors.begin(); it!=m_SubActors.end(); ++it )
+	{
+		Actor *pActor = *it;
+		pActor->ProcessMessages( fDeltaTime );
+	}
+}
+
 #define PropagateActorFrameCommand( cmd ) \
 	void ActorFrame::cmd()				\
 	{									\
diff --git a/stepmania/src/ActorFrame.h b/stepmania/src/ActorFrame.h
index b5aef0f910..9b596ee322 100644
--- a/stepmania/src/ActorFrame.h
+++ b/stepmania/src/ActorFrame.h
@@ -37,6 +37,7 @@ public:
 	virtual void RunCommandsOnLeaves( const LuaReference& cmds, Actor* pParent ); /* but not on self */
 
 	virtual void UpdateInternal( float fDeltaTime );
+	virtual void ProcessMessages( float fDeltaTime );
 	virtual void DrawPrimitives();
 
 	// propagated commands