diff --git a/lib/csv/parser.rb b/lib/csv/parser.rb
index afb3131c..1f8b150e 100644
--- a/lib/csv/parser.rb
+++ b/lib/csv/parser.rb
@@ -485,7 +485,6 @@ def prepare_quote_character
           message = ":quote_char has to be nil or a single character String"
           raise ArgumentError, message
         end
-        @double_quote_character = @quote_character * 2
         @escaped_quote_character = Regexp.escape(@quote_character)
         @escaped_quote = Regexp.new(@escaped_quote_character)
       end