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-rw-r--r--ext/mathn/complex/extconf.rb1
-rw-r--r--ext/mathn/rational/extconf.rb1
2 files changed, 2 insertions, 0 deletions
diff --git a/ext/mathn/complex/extconf.rb b/ext/mathn/complex/extconf.rb
index d4d14ffcb8..a3f45ac4fc 100644
--- a/ext/mathn/complex/extconf.rb
+++ b/ext/mathn/complex/extconf.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "mkmf"
create_makefile "mathn/complex"
diff --git a/ext/mathn/rational/extconf.rb b/ext/mathn/rational/extconf.rb
index ba76306b7b..4e4cc5f621 100644
--- a/ext/mathn/rational/extconf.rb
+++ b/ext/mathn/rational/extconf.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "mkmf"
create_makefile "mathn/rational"