diff --git a/rp2040-hal/src/i2c.rs b/rp2040-hal/src/i2c.rs
index 3778419..e0994b2 100644
--- a/rp2040-hal/src/i2c.rs
+++ b/rp2040-hal/src/i2c.rs
@@ -79,6 +79,31 @@ pub enum Error {
     AddressReserved(u16),
 }
 
+#[cfg(feature = "eh1_0_alpha")]
+impl eh1_0_alpha::i2c::Error for Error {
+    fn kind(&self) -> eh1_0_alpha::i2c::ErrorKind {
+        match &self {
+            Error::Abort(v) if v & 1<<12 != 0 // ARB_LOST
+                => eh1_0_alpha::i2c::ErrorKind::ArbitrationLoss,
+            Error::Abort(v) if v & 1<<7 != 0 // ABRT_SBYTE_ACKDET
+                => eh1_0_alpha::i2c::ErrorKind::Bus,
+            Error::Abort(v) if v & 1<<6 != 0 // ABRT_HS_ACKDET
+                => eh1_0_alpha::i2c::ErrorKind::Bus,
+            Error::Abort(v) if v & 1<<4 != 0 // ABRT_GCALL_NOACK
+                => eh1_0_alpha::i2c::ErrorKind::NoAcknowledge(eh1_0_alpha::i2c::NoAcknowledgeSource::Address),
+            Error::Abort(v) if v & 1<<3 != 0 // ABRT_TXDATA_NOACK
+                => eh1_0_alpha::i2c::ErrorKind::NoAcknowledge(eh1_0_alpha::i2c::NoAcknowledgeSource::Data),
+            Error::Abort(v) if v & 1<<2 != 0 // ABRT_10ADDR2_NOACK
+                => eh1_0_alpha::i2c::ErrorKind::NoAcknowledge(eh1_0_alpha::i2c::NoAcknowledgeSource::Address),
+            Error::Abort(v) if v & 1<<1 != 0 // ABRT_10ADDR1_NOACK
+                => eh1_0_alpha::i2c::ErrorKind::NoAcknowledge(eh1_0_alpha::i2c::NoAcknowledgeSource::Address),
+            Error::Abort(v) if v & 1<<0 != 0 // ABRT_7B_ADDR_NOACK
+                => eh1_0_alpha::i2c::ErrorKind::NoAcknowledge(eh1_0_alpha::i2c::NoAcknowledgeSource::Address),
+            _ => eh1_0_alpha::i2c::ErrorKind::Other,
+        }
+    }
+}
+
 /// SCL pin
 pub trait SclPin<I2C>: Sealed {}
 
diff --git a/rp2040-hal/src/i2c/controller.rs b/rp2040-hal/src/i2c/controller.rs
index 8d70e00..212bf58 100644
--- a/rp2040-hal/src/i2c/controller.rs
+++ b/rp2040-hal/src/i2c/controller.rs
@@ -278,7 +278,7 @@ impl<T: Deref<Target = Block>, PINS> Write for I2C<T, PINS, Controller> {
 impl<T: Deref<Target = Block>, PINS> eh1::Write for I2C<T, PINS, Controller> {
     type Error = Error;
 
-    fn write(&mut self, addr: u8, bytes: &[u8]) -> Result<(), Error> {
+    fn write(&mut self, addr: u8, bytes: &[u8]) -> Result<(), Self::Error> {
         Write::write(self, addr, bytes)
     }
 }