diff --git a/embedded-hal-async/src/spi.rs b/embedded-hal-async/src/spi.rs
index 8cb94f7ce..73f1d4d42 100644
--- a/embedded-hal-async/src/spi.rs
+++ b/embedded-hal-async/src/spi.rs
@@ -1,4 +1,4 @@
-//! Serial Peripheral Interface
+//! SPI master mode traits.
 
 use core::{fmt::Debug, future::Future};
 
diff --git a/src/spi/blocking.rs b/src/spi/blocking.rs
index 44661ce6b..a385d15b4 100644
--- a/src/spi/blocking.rs
+++ b/src/spi/blocking.rs
@@ -1,4 +1,4 @@
-//! Blocking SPI API
+//! Blocking SPI master mode traits.
 //!
 //! # Bus vs Device
 //!
diff --git a/src/spi/mod.rs b/src/spi/mod.rs
index acafc89f3..85254e262 100644
--- a/src/spi/mod.rs
+++ b/src/spi/mod.rs
@@ -1,4 +1,4 @@
-//! SPI traits
+//! SPI master mode traits.
 
 pub mod blocking;
 pub mod nb;
diff --git a/src/spi/nb.rs b/src/spi/nb.rs
index 9a2fc12f6..5257f930a 100644
--- a/src/spi/nb.rs
+++ b/src/spi/nb.rs
@@ -1,4 +1,4 @@
-//! Serial Peripheral Interface
+//! SPI master mode traits using `nb`.
 
 use super::ErrorType;