<term><constant>-EINVAL</constant></term>
<listitem><para>An invalid argument has been passed. This includes
- specyfing an empty mask in <parameter>options</parameter> or a mask
+ specifying an empty mask in <parameter>options</parameter> or a mask
which contains values different than a combination of
<constant>WEXITED</constant>, <constant>WSTOPPED</constant>, and
<constant>WCONTINUED</constant>.