diff --git a/man/systemd.unit.xml b/man/systemd.unit.xml
index ff199e43cb..d447c3a0a5 100644
--- a/man/systemd.unit.xml
+++ b/man/systemd.unit.xml
@@ -618,6 +618,7 @@
                                 <varname>microsoft</varname>,
                                 <varname>oracle</varname>,
                                 <varname>xen</varname>,
+                                <varname>pidns</varname>,
                                 <varname>openvz</varname> to test
                                 against a specific implementation. The
                                 test may be negated by prepending an
diff --git a/src/util.c b/src/util.c
index c9c88927b0..1febd073d2 100644
--- a/src/util.c
+++ b/src/util.c
@@ -3991,7 +3991,7 @@ int detect_container(const char **id) {
                                 fclose(f);
 
                                 if (id)
-                                        *id = "ns";
+                                        *id = "pidns";
 
                                 return 1;
                         }