diff --git a/lib/coderay/encoders/html/output.rb b/lib/coderay/encoders/html/output.rb
index ee87fea5..b24c882a 100644
--- a/lib/coderay/encoders/html/output.rb
+++ b/lib/coderay/encoders/html/output.rb
@@ -25,7 +25,7 @@ def extended o  # :nodoc:
 
         def make_stylesheet css, in_tag = false  # :nodoc:
           sheet = css.stylesheet
-          sheet = <<-'CSS' if in_tag
+          sheet = <<-CSS if in_tag
 <style type="text/css">
 #{sheet}
 </style>