diff --git a/lib/net/pop.rb b/lib/net/pop.rb
index 95d07652b6..60da7a0dd7 100644
--- a/lib/net/pop.rb
+++ b/lib/net/pop.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 # = net/pop.rb
 #
 # Copyright (c) 1999-2007 Yukihiro Matsumoto.
diff --git a/test/net/pop/test_pop.rb b/test/net/pop/test_pop.rb
index f06ccb4452..666aac0db6 100644
--- a/test/net/pop/test_pop.rb
+++ b/test/net/pop/test_pop.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'net/pop'
 require 'test/unit'
 require 'digest/md5'