diff --git a/lib/rouge/lexers/python.rb b/lib/rouge/lexers/python.rb
index 01b826b624..6ab0c31365 100644
--- a/lib/rouge/lexers/python.rb
+++ b/lib/rouge/lexers/python.rb
@@ -210,7 +210,7 @@ def current_string
           | [0-7]{1,3}
           )
         )x do
-          token (current_string.type?("r") ? Str : Str::Escape)
+          current_string.type?("r") ? token(Str) : token(Str::Escape)
           pop!
         end