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-rw-r--r--ext/json/lib/json/add/exception.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/json/lib/json/add/exception.rb b/ext/json/lib/json/add/exception.rb
index e6ad257abf..95379d97f5 100644
--- a/ext/json/lib/json/add/exception.rb
+++ b/ext/json/lib/json/add/exception.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
unless defined?(::JSON::JSON_LOADED) and ::JSON::JSON_LOADED
require 'json'
end