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-rw-r--r--ext/etc/extconf.rb1
-rw-r--r--ext/etc/mkconstants.rb1
2 files changed, 2 insertions, 0 deletions
diff --git a/ext/etc/extconf.rb b/ext/etc/extconf.rb
index c6b41a4c92..11bc9458c0 100644
--- a/ext/etc/extconf.rb
+++ b/ext/etc/extconf.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'mkmf'
headers = []
diff --git a/ext/etc/mkconstants.rb b/ext/etc/mkconstants.rb
index c9fddfd132..0c4d17e6f9 100644
--- a/ext/etc/mkconstants.rb
+++ b/ext/etc/mkconstants.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'optparse'
require 'erb'