diff --git a/cmd/headscale/cli/root.go b/cmd/headscale/cli/root.go
index ef047f93..e5115f3d 100644
--- a/cmd/headscale/cli/root.go
+++ b/cmd/headscale/cli/root.go
@@ -9,7 +9,7 @@ import (
 
 func init() {
 	rootCmd.PersistentFlags().
-		StringP("output", "o", "", "Output format. Empty for human-readable, 'json' or 'json-line'")
+		StringP("output", "o", "", "Output format. Empty for human-readable, 'json', 'json-line' or 'yaml'")
 	rootCmd.PersistentFlags().Bool("force", false, "Disable prompts and forces the execution")
 }