diff --git a/make_diff.sh b/make_diff.sh
index 39ac1737dc..9f20954136 100644
--- a/make_diff.sh
+++ b/make_diff.sh
@@ -1 +1 @@
-hg diff -r openttd -B --nodates -X make_diff.sh -X release.sh -X check_diff.sh -X novattd.sublime-project -X src/rev.cpp -X .hgignore -X src/rev.cpp.in -X Makefile.src.in
+hg diff -r openttd -B --nodates -X make_diff.sh -X release.sh -X check_diff.sh -X novattd.sublime-project -X src/rev.cpp -X .hgignore -X src/rev.cpp.in -X Makefile.src.in -X build_number.txt