diff --git a/stepmania/src/Sprite.cpp b/stepmania/src/Sprite.cpp
index f5eac75e27..0c909fbe29 100644
--- a/stepmania/src/Sprite.cpp
+++ b/stepmania/src/Sprite.cpp
@@ -18,6 +18,7 @@
 
 // lua start
 LUA_REGISTER_CLASS( Sprite )
+REGISTER_ACTOR_CLASS( Sprite )
 // lua end