diff --git a/Makefile b/Makefile
index 6974acc2..c6d56687 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@ override PYSOL_DEBUG=1
 PYSOLLIB_FILES=pysollib/tk/*.py pysollib/tile/*.py pysollib/*.py \
 	pysollib/games/*.py pysollib/games/special/*.py \
 	pysollib/games/ultra/*.py pysollib/games/mahjongg/*.py \
-  pysollib/kivy/*.py
+	pysollib/kivy/*.py
 
 .PHONY : all install dist all_games_html rules pot mo