diff --git a/man/login.defs.d/TTYGROUP.xml b/man/login.defs.d/TTYGROUP.xml
index 8e0a9e87..fba16173 100644
--- a/man/login.defs.d/TTYGROUP.xml
+++ b/man/login.defs.d/TTYGROUP.xml
@@ -6,7 +6,7 @@
 -->
 <varlistentry>
   <term><option>TTYGROUP</option> (string)</term>
-  <term><option>TTYPERM</option> (string)</term>
+  <term><option>TTYPERM</option> (number)</term>
   <listitem>
     <para>
       The terminal permissions: the login tty will be owned by the