diff --git a/man/systemd-delta.xml b/man/systemd-delta.xml
index 92b875436b..793c02f265 100644
--- a/man/systemd-delta.xml
+++ b/man/systemd-delta.xml
@@ -25,7 +25,11 @@
     <cmdsynopsis>
       <command>systemd-delta</command>
       <arg choice="opt" rep="repeat">OPTIONS</arg>
-      <arg choice="opt" rep="repeat"><replaceable>PREFIX</replaceable><optional>/<replaceable>SUFFIX</replaceable></optional>|<replaceable>SUFFIX</replaceable></arg>
+      <group choice="opt" rep="repeat">
+        <arg choice="plain"><replaceable>PREFIX</replaceable></arg>
+        <arg choice="plain"><replaceable>PREFIX</replaceable>/<replaceable>SUFFIX</replaceable></arg>
+        <arg choice="plain"><replaceable>SUFFIX</replaceable></arg>
+      </group>
     </cmdsynopsis>
   </refsynopsisdiv>