diff --git a/README.md b/README.md
index 7ffd1d4..a863685 100644
--- a/README.md
+++ b/README.md
@@ -138,8 +138,8 @@ Test files are found in the `t/` directory.
 Run `for f in ./lib/**/*.pm; do perltidy -b $f; done` to format all Perl files
 with [Perl-Tidy](https://metacpan.org/release/Perl-Tidy) (there is no built-in
 option to format files recursively). This will produce backup files with `.bak`
-extensions, so run `rm -r *.bak` to clean up your local copy if you are happy
-with the formatted files.
+extensions, so run `find . -name '*.bak' -delete` to clean up your local copy 
+if you are happy with the formatted files.
 
 Run `perlcritic lib` to lint all Perl files with [Perl-Critic](https://metacpan.org/release/Perl-Critic).