diff --git a/introspection/org.freedesktop.ModemManager1.Modem.Simple.xml b/introspection/org.freedesktop.ModemManager1.Modem.Simple.xml
index 983875de..fc3745f3 100644
--- a/introspection/org.freedesktop.ModemManager1.Modem.Simple.xml
+++ b/introspection/org.freedesktop.ModemManager1.Modem.Simple.xml
@@ -86,6 +86,18 @@
               Given as a string value (signature <literal>"s"</literal>).
             </listitem>
           </varlistentry>
+          <varlistentry><term><literal>"user"</literal></term>
+            <listitem>
+              User name (if any) required by the network, given as a string
+              value (signature <literal>"s"</literal>). Optional in 3GPP.
+            </listitem>
+          </varlistentry>
+          <varlistentry><term><literal>"password"</literal></term>
+            <listitem>
+              Password (if any) required by the network, given as a string value
+              (signature <literal>"s"</literal>). Optional in 3GPP.
+            </listitem>
+          </varlistentry>
           <varlistentry><term><literal>"number"</literal></term>
             <listitem>
               For POTS devices the number to dial,,