1 files changed, 2 insertions, 0 deletions

diff --git a/embassy-embedded-hal/src/shared_bus/mod.rs b/embassy-embedded-hal/src/shared_bus/mod.rs
index 76ee413d9..617d921e9 100644
--- a/embassy-embedded-hal/src/shared_bus/mod.rs
+++ b/embassy-embedded-hal/src/shared_bus/mod.rs
@@ -10,6 +10,7 @@ pub mod blocking;
 
 /// Error returned by I2C device implementations in this crate.
 #[derive(Copy, Clone, Eq, PartialEq, Debug)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum I2cDeviceError<BUS> {
     /// An operation on the inner I2C bus failed.
     I2c(BUS),
@@ -28,6 +29,7 @@ where
 
 /// Error returned by SPI device implementations in this crate.
 #[derive(Copy, Clone, Eq, PartialEq, Debug)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum SpiDeviceError<BUS, CS> {
     /// An operation on the inner SPI bus failed.
     Spi(BUS),