diff --git a/reference/pcre/functions/preg-quote.xml b/reference/pcre/functions/preg-quote.xml
index c8f4ecddbf..db0cdeb116 100644
--- a/reference/pcre/functions/preg-quote.xml
+++ b/reference/pcre/functions/preg-quote.xml
@@ -22,7 +22,7 @@
   </para>
   <para>
    The special regular expression characters are:
-   <literal>. \ + * ? [ ^ ] $ ( ) { } = ! &lt; &gt; | : -</literal>
+   <literal>. \ + * ? [ ^ ] $ ( ) { } = ! &lt; &gt; | : - #</literal>
   </para>
   <para>
    Note that <literal>/</literal> is not a special regular expression character.