diff --git a/MANIFEST.in b/MANIFEST.in
index 0d5160bb0..1c9f3dbb4 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -12,7 +12,7 @@ include pysollib/winsystems/*.py
 include pysollib/tk/*.py pysollib/tile/*.py pysollib/pysolgtk/*.py
 include pysollib/game/*.py
 include pysollib/games/*.py pysollib/games/special/*.py
-include pysollib/games/ultra/*.py pysollib/games/mahjongg/*.py
+include pysollib/games/mahjongg/*.py
 include data/tcl/*.tcl
 include data/pysol.desktop
 include data/pysolfc.glade
diff --git a/html-src/gen-html.py b/html-src/gen-html.py
index 4b2409607..f64b754de 100755
--- a/html-src/gen-html.py
+++ b/html-src/gen-html.py
@@ -19,7 +19,6 @@
 import pysollib.games  # noqa: E402,F402,I100,I202
 import pysollib.games.mahjongg  # noqa: E402,F402
 import pysollib.games.special  # noqa: E402,F401,F402
-import pysollib.games.ultra  # noqa: E402,F401,F402
 
 try:
     os.mkdir('html')
diff --git a/setup.py b/setup.py
index 6f6f0ee1d..2cd26a99a 100644
--- a/setup.py
+++ b/setup.py
@@ -92,7 +92,6 @@ def get_data_files(source, destination):
                  'pysollib.game',
                  'pysollib.games',
                  'pysollib.games.special',
-                 'pysollib.games.ultra',
                  'pysollib.games.mahjongg'],
     'data_files': data_files,
     }