diff --git a/primitives/src/lib.rs b/primitives/src/lib.rs
index 451a3c166..f73a7ce17 100644
--- a/primitives/src/lib.rs
+++ b/primitives/src/lib.rs
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: CC0-1.0
 
-//! # Rust Bitcoin - primitive types.
+//! # Rust Bitcoin - primitive types
 //!
 //! Primitive data types that are used throughout the [`rust-bitcoin`] ecosystem.
 //!
diff --git a/units/src/lib.rs b/units/src/lib.rs
index 4d3be98ac..5a9742986 100644
--- a/units/src/lib.rs
+++ b/units/src/lib.rs
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: CC0-1.0
 
-//! Rust Bitcoin units library
+//! # Rust Bitcoin - unit types
 //!
 //! This library provides basic types used by the Rust Bitcoin ecosystem.