diff -r 9af7a7f14e94 Tools/clinic/clinic.py
--- a/Tools/clinic/clinic.py	Fri Jan 24 15:34:19 2014 +0100
+++ b/Tools/clinic/clinic.py	Fri Jan 24 11:53:47 2014 -0600
@@ -120,6 +120,7 @@
 
 def quoted_for_c_string(s):
     for old, new in (
+        ('\\', '\\\\'), # must be first!
         ('"', '\\"'),
         ("'", "\\'"),
         ):