diff --git a/man/tmpfiles.d.xml b/man/tmpfiles.d.xml
index a86ef33695..86fa4394c0 100644
--- a/man/tmpfiles.d.xml
+++ b/man/tmpfiles.d.xml
@@ -265,7 +265,12 @@ L    /tmp/foobar -    -    -    -   /dev/null</programlisting>
                         </variablelist>
 
                         <para>If multiple integers and units are specified the time
-                        values are summed up.</para>
+                        values are summed up. If an integer is given witohut a unit,
+                        s is assumed.
+                        </para>
+
+                        <para>When the age is set to zero, the files are cleaned
+                        unconditionally.</para>
 
                         <para>The age field only applies to lines starting with
                         d, D and x. If omitted or set to - no automatic clean-up
diff --git a/src/tmpfiles/tmpfiles.c b/src/tmpfiles/tmpfiles.c
index c32cbd1aea..c27d0112f9 100644
--- a/src/tmpfiles/tmpfiles.c
+++ b/src/tmpfiles/tmpfiles.c
@@ -409,7 +409,7 @@ static int clean_item(Item *i) {
             i->type != IGNORE_PATH)
                 return 0;
 
-        if (!i->age_set || i->age <= 0)
+        if (!i->age_set)
                 return 0;
 
         n = now(CLOCK_REALTIME);