diff --git a/stepmania/src/Makefile.am b/stepmania/src/Makefile.am
index 0c3b62d73c..9d56627138 100644
--- a/stepmania/src/Makefile.am
+++ b/stepmania/src/Makefile.am
@@ -76,7 +76,7 @@ Transitions = Transition.cpp Transition.h
 
 Actors = \
 Actor.cpp Actor.h ActorFrame.cpp ActorFrame.h BitmapText.cpp BitmapText.h Quad.h Sample3dObject.cpp Sample3dObject.h \
-Sprite.cpp Sprite.h ActorScroller.cpp ActorScroller.h Model.cpp Model.h mathlib.c mathlib.h
+Sprite.cpp Sprite.h ActorScroller.cpp ActorScroller.h Model.cpp Model.h mathlib.c mathlib.h ModelTypes.cpp ModelTypes.h
 
 ActorsInMenus = \
 Banner.cpp Banner.h BannerWithFrame.cpp BannerWithFrame.h BPMDisplay.cpp BPMDisplay.h CourseContentsList.cpp \