diff --git a/make_diff.sh b/make_diff.sh
new file mode 100644
index 0000000000..39ac1737dc
--- /dev/null
+++ b/make_diff.sh
@@ -0,0 +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