diff --git a/Doc/library/optparse.rst b/Doc/library/optparse.rst
index 6af40745fbc..604ac7f8592 100644
--- a/Doc/library/optparse.rst
+++ b/Doc/library/optparse.rst
@@ -1651,7 +1651,7 @@ arguments::
             value.append(arg)
 
         del parser.rargs[:len(value)]
-        setattr(parser.values, option.dest, value))
+        setattr(parser.values, option.dest, value)
 
    [...]
    parser.add_option("-c", "--callback", dest="vararg_attr",