diff --git a/src/uu/tr/src/operation.rs b/src/uu/tr/src/operation.rs
index cd6a83de6..5565de6a1 100644
--- a/src/uu/tr/src/operation.rs
+++ b/src/uu/tr/src/operation.rs
@@ -3,7 +3,7 @@
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
 
-// spell-checker:ignore (strings) anychar combinator Alnum Punct Xdigit alnum punct xdigit cntrl
+// spell-checker:ignore (strings) anychar combinator Alnum Punct Xdigit alnum punct xdigit cntrl boop
 
 use nom::{
     branch::alt,