diff --git a/doc/en/faq.rst b/doc/en/faq.rst
index f91c953f9..dbcaf3fd4 100644
--- a/doc/en/faq.rst
+++ b/doc/en/faq.rst
@@ -76,7 +76,7 @@ be the same, confusing the reinterpreter and obfuscating the initial
 error (this is also explained at the command line if it happens).
 
 You can also turn off all assertion interaction using the
-``--assertmode=off`` option.
+``--assert=plain`` option.
 
 .. _`py namespaces`: index.html
 .. _`py/__init__.py`: http://bitbucket.org/hpk42/py-trunk/src/trunk/py/__init__.py