diff --git a/lib/ams/inflector.rb b/lib/ams/inflector.rb
index 2bd30942..533497a0 100644
--- a/lib/ams/inflector.rb
+++ b/lib/ams/inflector.rb
@@ -25,7 +25,7 @@ module AMS
       #
       #   camelize(underscore('SSLError'))  # => "SslError"
       def underscore(camel_cased_word)
-        return camel_cased_word unless /[A-Z-]|::/.match?(camel_cased_word)
+        return camel_cased_word unless /[A-Z-]|::/.match(camel_cased_word)
         word = camel_cased_word.to_s.gsub("::".freeze, "/".freeze)
         word.gsub!(/([A-Z\d]+)([A-Z][a-z])/, '\1_\2'.freeze)
         word.gsub!(/([a-z\d])([A-Z])/, '\1_\2'.freeze)