diff --git a/src/uu/ptx/src/ptx.rs b/src/uu/ptx/src/ptx.rs
index c3bedb266..2f253b580 100644
--- a/src/uu/ptx/src/ptx.rs
+++ b/src/uu/ptx/src/ptx.rs
@@ -5,7 +5,7 @@
 //  * For the full copyright and license information, please view the LICENSE
 //  * file that was distributed with this source code.
 
-// spell-checker:ignore (ToDOs) corasick memchr Roff trunc oset iset
+// spell-checker:ignore (ToDOs) corasick memchr Roff trunc oset iset CHARCLASS
 
 use clap::{crate_version, Arg, Command};
 use regex::Regex;