diff --git a/man/systemctl.xml b/man/systemctl.xml
index 14405141cf..615d62a13f 100644
--- a/man/systemctl.xml
+++ b/man/systemctl.xml
@@ -819,9 +819,11 @@ Sun 2017-02-26 20:57:49 EST  2h 3min left  Sun 2017-02-26 11:56:36 EST  6h ago
           <term><command>isolate <replaceable>NAME</replaceable></command></term>
 
           <listitem>
-            <para>Start the unit specified on the command line and its
-            dependencies and stop all others. If a unit name with no
-            extension is given, an extension of
+            <para>Start the unit specified on the command line and its dependencies
+            and stop all others, unless they have
+            <option>IgnoreOnIsolate=yes</option> (see
+            <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>).
+            If a unit name with no extension is given, an extension of
             <literal>.target</literal> will be assumed.</para>
 
             <para>This is similar to changing the runlevel in a
diff --git a/man/systemd.unit.xml b/man/systemd.unit.xml
index dedeb6c6d0..d58a2f56db 100644
--- a/man/systemd.unit.xml
+++ b/man/systemd.unit.xml
@@ -651,10 +651,11 @@
       <varlistentry>
         <term><varname>IgnoreOnIsolate=</varname></term>
 
-        <listitem><para>Takes a boolean argument. If
-        <option>true</option>, this unit will not be stopped when
-        isolating another unit. Defaults to
-        <option>false</option>.</para></listitem>
+        <listitem><para>Takes a boolean argument. If <option>true</option>, this unit
+        will not be stopped when isolating another unit. Defaults to
+        <option>false</option> for service, target, socket, busname, timer, and path
+        units, and <option>true</option> for slice, scope, device, swap, mount, and
+        automount units.</para></listitem>
       </varlistentry>
 
       <varlistentry>