diff --git a/Makefile.am b/Makefile.am
index fa25485b73..89eaf80575 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -616,7 +616,8 @@ EXTRA_DIST += \
 	units/initrd-udevadm-cleanup-db.service.in \
 	units/initrd-switch-root.service.in \
 	units/systemd-nspawn@.service.in \
-	units/systemd-update-done.service.in
+	units/systemd-update-done.service.in \
+    units/tmp.mount.m4
 
 if HAVE_SYSV_COMPAT
 nodist_systemunit_DATA += \
diff --git a/units/tmp.mount b/units/tmp.mount.m4
similarity index 92%
rename from units/tmp.mount
rename to units/tmp.mount.m4
index 00a0d28722..e1e26bdfc0 100644
--- a/units/tmp.mount
+++ b/units/tmp.mount.m4
@@ -19,3 +19,6 @@ What=tmpfs
 Where=/tmp
 Type=tmpfs
 Options=mode=1777,strictatime
+m4_ifdef(`HAVE_SMACK',
+SmackFileSystemRoot=*
+)m4_dnl