diff --git a/man/systemd.mount.xml b/man/systemd.mount.xml
index d775d74053..4200a9ed7e 100644
--- a/man/systemd.mount.xml
+++ b/man/systemd.mount.xml
@@ -444,9 +444,9 @@
         created. (See
         <citerefentry><refentrytitle>systemd.device</refentrytitle><manvolnum>5</manvolnum></citerefentry>
         for more information.) This option is mandatory. Note that the usual specifier expansion is applied
-        to this setting, literal percent characters should hence be written as <literal>%%</literal>. If this
-        mount is a bind mount and the specified path does not exist yet it is created as
-        directory.</para></listitem>
+        to this setting, literal percent characters should hence be written as <literal
+        class='specifiers'>%%</literal>. If this mount is a bind mount and the specified path does not exist
+        yet it is created as directory.</para></listitem>
       </varlistentry>
 
       <varlistentry>
@@ -469,7 +469,7 @@
 
         <listitem><para>Mount options to use when mounting. This takes a comma-separated list of options. This setting
         is optional. Note that the usual specifier expansion is applied to this setting, literal percent characters
-        should hence be written as <literal>%%</literal>.</para></listitem>
+        should hence be written as <literal class='specifiers'>%%</literal>.</para></listitem>
       </varlistentry>
 
       <varlistentry>
diff --git a/man/systemd.swap.xml b/man/systemd.swap.xml
index 190fc388c0..c4160290a5 100644
--- a/man/systemd.swap.xml
+++ b/man/systemd.swap.xml
@@ -184,11 +184,13 @@
         project='man-pages'><refentrytitle>swapon</refentrytitle><manvolnum>8</manvolnum></citerefentry> for
         details. If this refers to a device node, a dependency on the respective device unit is automatically
         created. (See
-        <citerefentry><refentrytitle>systemd.device</refentrytitle><manvolnum>5</manvolnum></citerefentry> for more
-        information.) If this refers to a file, a dependency on the respective mount unit is automatically
-        created. (See <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>
-        for more information.) This option is mandatory. Note that the usual specifier expansion is applied to this
-        setting, literal percent characters should hence be written as <literal>%%</literal>.</para></listitem>
+        <citerefentry><refentrytitle>systemd.device</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+        for more information.) If this refers to a file, a dependency on the respective mount unit is
+        automatically created. (See
+        <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry> for
+        more information.) This option is mandatory. Note that the usual specifier expansion is applied to
+        this setting, literal percent characters should hence be written as
+        <literal class='specifiers'>%%</literal>.</para></listitem>
       </varlistentry>
 
       <varlistentry>
diff --git a/tools/make-directive-index.py b/tools/make-directive-index.py
index c6b2173b2e..b04281490d 100755
--- a/tools/make-directive-index.py
+++ b/tools/make-directive-index.py
@@ -95,6 +95,9 @@ def _extract_directives(directive_groups, formatting, page):
             continue
         storfile[name.text].append((pagename, section))
         formatting[name.text] = name
+    for name in t.iterfind(".//literal[@class='specifiers']"):
+        storfile[name.text].append((pagename, section))
+        formatting[name.text] = name
 
 def _make_section(template, name, directives, formatting):
     varlist = template.find(".//*[@id='{}']".format(name))