diff --git a/ChangeLog b/ChangeLog
index a5fe50de08..271c53d8b9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -18,6 +18,11 @@ Sun Oct  4 00:09:45 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 	  - do not set other environment variables, e.g. PWD, SHLVL, etc
 	  - do not open other FDs, e.g. pipes for timer thread
 
+Sun Oct 2 10:59:00 2015  schneems  <richard.schneeman@gmail.com>
+
+	* ext/pathname/lib/pathname.rb: freeze string literals for
+	  reduced object allocation.
+
 Fri Oct  2 09:20:20 2015  Martin Duerst  <duerst@it.aoyama.ac.jp>
 
 	* common.mk, lib/unicode_normalize/tables.rb: Change Unicode
diff --git a/ext/pathname/lib/pathname.rb b/ext/pathname/lib/pathname.rb
index 9f23ba502e..85588663f8 100644
--- a/ext/pathname/lib/pathname.rb
+++ b/ext/pathname/lib/pathname.rb
@@ -1,3 +1,4 @@
+# -*- frozen_string_literal: true -*-
 #
 # = pathname.rb
 #