diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9225845..c673716 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 - Add `start()` and `end()` method to the `Region` trait.
 - Much faster `OverlapIterator`.
+- Add optional `defmt` attribute for `NorFlashErrorKind` gated by a new feature `defmt-03`.
 
 ## [0.3.1] - 2023-12-04
 
diff --git a/Cargo.toml b/Cargo.toml
index c851083..b3c7f7f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,3 +13,9 @@ documentation = "https://docs.rs/embedded-storage"
 readme = "README.md"
 keywords = ["storage"]
 categories = ["embedded", "hardware-support", "no-std"]
+
+[dependencies]
+defmt = { version = "0.3.8", optional = true }
+
+[features]
+defmt-03 = ["dep:defmt"]
diff --git a/src/nor_flash.rs b/src/nor_flash.rs
index c20ddba..9e2dfad 100644
--- a/src/nor_flash.rs
+++ b/src/nor_flash.rs
@@ -26,6 +26,7 @@ pub trait ErrorType {
 /// NOR flash implementations must map their error to those generic error kinds through the
 /// [`NorFlashError`] trait.
 #[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
+#[cfg_attr(feature = "defmt-03", derive(defmt::Format))]
 #[non_exhaustive]
 pub enum NorFlashErrorKind {
 	/// The arguments are not properly aligned.