diff --git a/shell-completion/bash/journalctl b/shell-completion/bash/journalctl
index 14dcd223b3..2efa1000e2 100644
--- a/shell-completion/bash/journalctl
+++ b/shell-completion/bash/journalctl
@@ -65,7 +65,7 @@ _journalctl() {
                                 compopt -o filenames
                         ;;
                         --output|-o)
-                                comps='short short-monotonic verbose export json cat'
+                                comps='short short-iso short-precise short-monotonic verbose export json json-pretty json-sse cat'
                         ;;
                         --field|-F)
                                 comps=${__journal_fields[*]}
diff --git a/shell-completion/zsh/_sd_outputmodes b/shell-completion/zsh/_sd_outputmodes
index dae8a5c0dd..2ce84a79a1 100644
--- a/shell-completion/zsh/_sd_outputmodes
+++ b/shell-completion/zsh/_sd_outputmodes
@@ -1,5 +1,5 @@
 #autoload
 
 local -a _output_opts
-_output_opts=(short short-monotonic verbose export json json-pretty json-see cat)
+_output_opts=(short short-iso short-precise short-monotonic verbose export json json-pretty json-see cat)
 _describe -t output 'output mode' _output_opts || compadd "$@"