diff --git a/stepmania/src/ActorCommands.cpp b/stepmania/src/ActorCommands.cpp
index e15e484efb..e9468911c9 100644
--- a/stepmania/src/ActorCommands.cpp
+++ b/stepmania/src/ActorCommands.cpp
@@ -43,7 +43,12 @@ ActorCommands &ActorCommands::operator=( const ActorCommands& cpy )
 	if( this == &cpy )
 		return *this;
 
-	*this = cpy;
+	Unregister();
+
+	/* Make a new reference. */
+	lua_rawgeti( LUA->L, LUA_REGISTRYINDEX, cpy.m_iLuaFunction );
+	m_iLuaFunction = luaL_ref( LUA->L, LUA_REGISTRYINDEX );
+
 	return *this;
 }