diff --git a/Lib/HTMLParser.py b/Lib/HTMLParser.py
index e018901..884d2a5 100644
--- a/Lib/HTMLParser.py
+++ b/Lib/HTMLParser.py
@@ -99,7 +99,7 @@
         markupbase.ParserBase.reset(self)
 
     def feed(self, data):
-        """Feed data to the parser.
+        r"""Feed data to the parser.
 
         Call this as often as you want, with as little or as much text
         as you want (may include '\n').