@@ -523,7 +523,7 @@ the correct values of a number of field options.
 And though you'll need to manually add your server-side validation, these
 field type options can then be guessed from that information.
 
-* ``required``: The ``required`` option can be guessed based off of the validation
+* ``required``: The ``required`` option can be guessed based on the validation
 rules (i.e. is the field ``NotBlank`` or ``NotNull``) or the Doctrine metadata
 (i.e. is the field ``nullable``). This is very useful, as your client-side
 validation will automatically match your validation rules.