diff --git a/substrate/core/cli/src/params.rs b/substrate/core/cli/src/params.rs
index 321cf17efb..0c1c48eee1 100644
--- a/substrate/core/cli/src/params.rs
+++ b/substrate/core/cli/src/params.rs
@@ -305,7 +305,7 @@ pub struct RunCmd {
 	#[structopt(long = "no-grandpa")]
 	pub no_grandpa: bool,
 
-	/// Run in light client mode
+	/// Experimental: Run in light client mode
 	#[structopt(long = "light")]
 	pub light: bool,