diff --git a/shell-completion/zsh/_systemctl.in b/shell-completion/zsh/_systemctl.in
index d7f05663ce..425ae54157 100644
--- a/shell-completion/zsh/_systemctl.in
+++ b/shell-completion/zsh/_systemctl.in
@@ -37,6 +37,7 @@
         "clean:Remove configuration, state, cache, logs or runtime data of units"
         "bind:Bind mount a path from the host into a unit's namespace"
         "mount-image:Mount an image from the host into a unit's namespace"
+        "whoami:Determines as part of which unit the command is being invoked"
     )
 
     local -a machine_commands=(