diff --git a/docs/MANUAL.rst b/docs/MANUAL.rst
index 6c29041..928ae40 100644
--- a/docs/MANUAL.rst
+++ b/docs/MANUAL.rst
@@ -478,7 +478,7 @@ Another nametrans transpose example
 
 Put everything in a GMX. subfolder except for the boxes INBOX, Draft, and Sent which should keep the same name::
 
-     nametrans = lambda folder: folder if folder in ['INBOX', 'Drafts', 'Sent'] \
+     nametrans: lambda folder: folder if folder in ['INBOX', 'Drafts', 'Sent'] \
                                else re.sub(r'^', r'GMX.', folder)
 
 2 IMAP using name translations