diff --git a/share/completions/poweroff.fish b/share/completions/poweroff.fish
new file mode 100644
index 000000000..3546cd98b
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+++ b/share/completions/poweroff.fish
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+complete -c poweroff -l help -d "Show help"
+complete -c poweroff -l halt -d "Halt the machine"
+complete -c poweroff -l poweroff -s p -d "Switch off the machine"
+complete -c poweroff -l reboot -d "Reboot the machine"
+complete -c poweroff -l force -s f -d "Force immediate halt/power-off/reboot"
+complete -c poweroff -l wtmp-only -s w -d "Just write wtmp record"
+complete -c poweroff -l no-wtmp -s d -d "Don't write wtmp record"
+complete -c poweroff -l no-wall -d "Don't send wall message"