diff --git a/units/local-fs-pre.target b/units/local-fs-pre.target
index f8760ec9df..809f2ed236 100644
--- a/units/local-fs-pre.target
+++ b/units/local-fs-pre.target
@@ -8,3 +8,4 @@
 [Unit]
 Description=Local File Systems (Pre)
 Documentation=man:systemd.special(7)
+RefuseManualStart=yes
diff --git a/units/nss-lookup.target b/units/nss-lookup.target
index 339b507fae..c9e3a7c419 100644
--- a/units/nss-lookup.target
+++ b/units/nss-lookup.target
@@ -11,3 +11,4 @@
 [Unit]
 Description=Host and Network Name Lookups
 Documentation=man:systemd.special(7)
+RefuseManualStart=yes
diff --git a/units/nss-user-lookup.target b/units/nss-user-lookup.target
index 43b722c970..80023cdfb6 100644
--- a/units/nss-user-lookup.target
+++ b/units/nss-user-lookup.target
@@ -11,3 +11,4 @@
 [Unit]
 Description=User and Group Name Lookups
 Documentation=man:systemd.special(7)
+RefuseManualStart=yes
diff --git a/units/remote-fs-pre.target b/units/remote-fs-pre.target
index febdc01c7c..36a196cfda 100644
--- a/units/remote-fs-pre.target
+++ b/units/remote-fs-pre.target
@@ -8,3 +8,4 @@
 [Unit]
 Description=Remote File Systems (Pre)
 Documentation=man:systemd.special(7)
+RefuseManualStart=yes
diff --git a/units/rpcbind.target b/units/rpcbind.target
index eb06a6db26..e03e915ee0 100644
--- a/units/rpcbind.target
+++ b/units/rpcbind.target
@@ -11,3 +11,4 @@
 [Unit]
 Description=RPC Port Mapper
 Documentation=man:systemd.special(7)
+RefuseManualStart=yes
diff --git a/units/time-sync.target b/units/time-sync.target
index ec00ecbbf4..54078069f2 100644
--- a/units/time-sync.target
+++ b/units/time-sync.target
@@ -11,3 +11,4 @@
 [Unit]
 Description=System Time Synchronized
 Documentation=man:systemd.special(7)
+RefuseManualStart=yes