diff --git a/substrate/frame/nomination-pools/src/lib.rs b/substrate/frame/nomination-pools/src/lib.rs
index cfde05ffee..e7c99e0232 100644
--- a/substrate/frame/nomination-pools/src/lib.rs
+++ b/substrate/frame/nomination-pools/src/lib.rs
@@ -133,7 +133,7 @@
 //! * Root: can change the nominator, bouncer, or itself, manage and claim commission, and can
 //!   perform any of the actions the nominator or bouncer can.
 //!
-//! ## Commission
+//! ### Commission
 //!
 //! A pool can optionally have a commission configuration, via the `root` role, set with
 //! [`Call::set_commission`] and claimed with [`Call::claim_commission`]. A payee account must be