diff --git a/doc/maintainers.md b/doc/maintainers.md
index 891a58b0d1..9aa1a03bf6 100644
--- a/doc/maintainers.md
+++ b/doc/maintainers.md
@@ -261,12 +261,6 @@ consensus on ruby-core/ruby-dev.
 * https://github.com/ruby/timeout
 * https://rubygems.org/gems/timeout
 
-#### lib/thwait.rb
-
-* Keiju ISHITSUKA ([keiju])
-* https://github.com/ruby/thwait
-* https://rubygems.org/gems/thwait
-
 #### lib/tmpdir.rb
 
 * *No maintainer*