diff --git a/de_DE.ISO8859-1/books/handbook/advanced-networking/chapter.xml b/de_DE.ISO8859-1/books/handbook/advanced-networking/chapter.xml
index b2a5ee9e28..726be9d350 100644
--- a/de_DE.ISO8859-1/books/handbook/advanced-networking/chapter.xml
+++ b/de_DE.ISO8859-1/books/handbook/advanced-networking/chapter.xml
@@ -5763,7 +5763,7 @@ ifconfig_carp1="vhid <replaceable>2</replaceable> advskew <replaceable>100</repl
       das obige Beispiel müssten folgende Zeilen in die Konfiguration
       aufgenommen werden:</para>
 
-    <programlisting>vlans_<replaceable>em0</replaceable>="<replaceable>5</replaceable>
+    <programlisting>vlans_<replaceable>em0</replaceable>="<replaceable>5</replaceable>"
 vlans_<replaceable>em0</replaceable>_<replaceable>5</replaceable>="inet 192.168.20.20/24"</programlisting>
 
     <para>Das gleiche Schema kann benutzt werden, um weitere