diff --git a/tmpfiles.d/tmp.conf b/tmpfiles.d/tmp.conf
index 1284fc4700..031770c04f 100644
--- a/tmpfiles.d/tmp.conf
+++ b/tmpfiles.d/tmp.conf
@@ -10,3 +10,6 @@
 # Clear tmp directories separately, to make them easier to override
 d /tmp 1777 root root 10d
 d /var/tmp 1777 root root 30d
+
+# Exclude namespace mountpoints created with PrivateTmp=yes
+X /tmp/systemd-private-*