diff --git a/Makefile.am b/Makefile.am
index d24393e..504c236 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -13,3 +13,4 @@ nobase_dist_pkgdata_DATA = \
     data/TakaoPGothic.ttf
 
 EXTRA_DIST = autogen.sh win32build.sh misc
+
diff --git a/music/Makefile.am b/music/Makefile.am
index 502e971..ac49eac 100644
--- a/music/Makefile.am
+++ b/music/Makefile.am
@@ -17,3 +17,6 @@ nobase_dist_music_DATA = \
     space_dimensions.ogg \
     through_space.ogg \
     walking_among_androids.ogg
+
+EXTRA_DIST = sources
+