diff --git a/man/udev.xml b/man/udev.xml
index db729378c5..2948b9ce2b 100644
--- a/man/udev.xml
+++ b/man/udev.xml
@@ -272,8 +272,8 @@
         </varlistentry>
       </variablelist>
 
-      <para>Most of the fields support shell glob pattern matching. The following
-      pattern characters are supported:</para>
+      <para>Most of the fields support shell glob pattern matching and
+      alternate patterns. The following special characters are supported:</para>
       <variablelist>
         <varlistentry>
           <term><literal>*</literal></term>
@@ -300,6 +300,14 @@
             any characters not enclosed are matched.</para>
           </listitem>
         </varlistentry>
+        <varlistentry>
+          <term><literal>|</literal></term>
+          <listitem>
+            <para>Separates alternative patterns. For example, the pattern string
+            <literal>abc|x*</literal> would match either <literal>abc</literal>
+            or <literal>x*</literal>.</para>
+          </listitem>
+        </varlistentry>
       </variablelist>
 
       <para>The following keys can get values assigned:</para>