diff --git a/.x-sc_space_tab b/.x-sc_space_tab
deleted file mode 100644
index 0c887f2..0000000
--- a/.x-sc_space_tab
+++ /dev/null
@@ -1 +0,0 @@
-^gl/lib/.*\.c\.diff$
diff --git a/cfg.mk b/cfg.mk
index bdaa631..45f52e0 100644
--- a/cfg.mk
+++ b/cfg.mk
@@ -64,3 +64,5 @@ config-save:
 	mkdir -p $(_cf_state_dir)/$(_date_time)
 	ln -nsf $(_date_time) $(_cf_state_dir)/latest
 	cp lib/config.h config.status $(_cf_state_dir)/latest
+
+exclude_file_name_regexp--sc_space_tab = ^gl/lib/.*\.c\.diff$$