diff --git a/docs/manual/mod/mod_authz_core.xml b/docs/manual/mod/mod_authz_core.xml
index 1425f0d42f5..344ff7b57aa 100644
--- a/docs/manual/mod/mod_authz_core.xml
+++ b/docs/manual/mod/mod_authz_core.xml
@@ -190,7 +190,7 @@ SetEnvIf User-Agent ^KnockKnock/2\.0 let_me_in
   decisions on arbitrary expressions.</p>
 
     <highlight language="config">
-        Require expr %{TIME_HOUR} -ge 9 &amp;&amp; %{TIME_HOUR} -le 17
+        Require expr "%{TIME_HOUR} -ge 9 &amp;&amp; %{TIME_HOUR} -le 17"
     </highlight>
 
   <p>The syntax is described in the <a href="../expr.html">ap_expr</a>
diff --git a/docs/manual/mod/mod_authz_core.xml.fr b/docs/manual/mod/mod_authz_core.xml.fr
index 352aa3f1c3c..234420c55b1 100644
--- a/docs/manual/mod/mod_authz_core.xml.fr
+++ b/docs/manual/mod/mod_authz_core.xml.fr
@@ -186,7 +186,7 @@ SetEnvIf User-Agent ^KnockKnock/2\.0 let_me_in
   d'acc&egrave;s en fonction d'expressions arbitraires.</p>
 
     <highlight language="config">
-         Require expr %{TIME_HOUR} -ge 9 &amp;&amp; %{TIME_HOUR} -le 17
+         Require expr "%{TIME_HOUR} -ge 9 &amp;&amp; %{TIME_HOUR} -le 17"
     </highlight>
 
     <p>La syntaxe de l'expression est d&eacute;crite dans la documentation de <a