diff --git a/pkg/kn/commands/completion.go b/pkg/kn/commands/completion.go
index 0c8a13843..5ea127891 100644
--- a/pkg/kn/commands/completion.go
+++ b/pkg/kn/commands/completion.go
@@ -30,6 +30,7 @@ func NewCompletionCommand(p *KnParams) *cobra.Command {
 	completionCmd := &cobra.Command{
 		Use:   "completion",
 		Short: "Output shell completion code (default Bash)",
+		Hidden: true,  // Don't show this in help listing.
 		Run: func(cmd *cobra.Command, args []string) {
 			if completionFlags.Zsh {
 				cmd.Root().GenZshCompletion(os.Stdout)