diff --git a/shell-completion/bash/systemctl.in b/shell-completion/bash/systemctl.in
index f2219f23ea..c1231653b6 100644
--- a/shell-completion/bash/systemctl.in
+++ b/shell-completion/bash/systemctl.in
@@ -229,7 +229,7 @@ _systemctl () {
         [JOBS]='cancel'
         [ENVS]='set-environment unset-environment import-environment'
         [STANDALONE]='daemon-reexec daemon-reload default whoami
-                             emergency exit halt hibernate hybrid-sleep
+                             emergency exit halt hibernate hybrid-sleep sleep
                              suspend-then-hibernate kexec soft-reboot list-jobs list-sockets
                              list-timers list-units list-unit-files poweroff
                              reboot rescue show-environment suspend get-default
diff --git a/shell-completion/zsh/_systemctl.in b/shell-completion/zsh/_systemctl.in
index a5a16b3fdb..0000147fe4 100644
--- a/shell-completion/zsh/_systemctl.in
+++ b/shell-completion/zsh/_systemctl.in
@@ -105,6 +105,7 @@
         "hibernate:Hibernate the system"
         "hybrid-sleep:Hibernate and suspend the system"
         "suspend-then-hibernate:Suspend the system for a period of time, and then hibernate it"
+        "sleep:Put the system to sleep"
     )
 
     local -a groups=( unit machine unit_file job environment manager_state system )