diff --git a/src/tools/runk/src/main.rs b/src/tools/runk/src/main.rs
index 9f338ec404..23334d149b 100644
--- a/src/tools/runk/src/main.rs
+++ b/src/tools/runk/src/main.rs
@@ -28,6 +28,7 @@ enum SubCommand {
     Common(CommonCmd),
     #[clap(flatten)]
     Custom(CustomCmd),
+    /// Launch an init process (do not call it outside of runk)
     Init {},
 }