diff --git a/stepmania/src/Makefile.am b/stepmania/src/Makefile.am
index 0e987e7bf8..5f7012936a 100644
--- a/stepmania/src/Makefile.am
+++ b/stepmania/src/Makefile.am
@@ -329,6 +329,7 @@ RageUtil_WorkerThread.cpp RageUtil_WorkerThread.h
 Actors = \
 Actor.cpp Actor.h ActorCollision.h ActorFrame.cpp ActorFrame.h \
 ActorScroller.cpp ActorScroller.h ActorUtil.cpp ActorUtil.h \
+ActorSound.cpp ActorSound.h \
 AutoActor.cpp AutoActor.h \
 BitmapText.cpp BitmapText.h Model.cpp Model.h \
 ModelManager.cpp ModelManager.h ModelTypes.cpp ModelTypes.h \