diff --git a/contrib/examples/fix.hgrc b/contrib/examples/fix.hgrc
--- a/contrib/examples/fix.hgrc
+++ b/contrib/examples/fix.hgrc
@@ -1,3 +1,6 @@
 [fix]
 clang-format:command = clang-format --style file -i
 clang-format:pattern = (**.c or **.cc or **.h) and not "listfile:contrib/clang-format-ignorelist"
+
+rustfmt:command = rustfmt {rootpath}
+rustfmt:pattern = set:**.rs