diff --git a/stepmania/src/Makefile.am b/stepmania/src/Makefile.am
index d3b2f0d1be..410638b71c 100644
--- a/stepmania/src/Makefile.am
+++ b/stepmania/src/Makefile.am
@@ -36,6 +36,7 @@ ScreenExit.cpp ScreenExit.h ScreenNetEvaluation.cpp ScreenNetEvaluation.h \
 ScreenNetSelectMusic.cpp ScreenNetSelectMusic.h ScreenNetSelectBase.cpp ScreenNetSelectBase.h ScreenNetRoom.cpp ScreenNetRoom.h \
 ScreenEz2SelectMusic.cpp ScreenEz2SelectMusic.h ScreenEz2SelectPlayer.cpp ScreenEz2SelectPlayer.h \
 ScreenGameplay.cpp ScreenGameplay.h \
+ScreenGameplayMultiplayer.cpp ScreenGameplayMultiplayer.h \
 ScreenGameplayNormal.cpp ScreenGameplayNormal.h \
 ScreenHowToPlay.cpp ScreenHowToPlay.h \
 ScreenInstructions.cpp ScreenInstructions.h \