diff --git a/rp2040-hal/src/spi.rs b/rp2040-hal/src/spi.rs
index b826683..babc486 100644
--- a/rp2040-hal/src/spi.rs
+++ b/rp2040-hal/src/spi.rs
@@ -190,6 +190,8 @@ impl<D: SpiDevice, const DS: u8> Spi<Enabled, D, DS> {
 ///
 /// For eh 1.0.0-alpha.6, Infallible doesn't implement spi::Error,
 /// so use a locally defined type instead.
+/// This should be removed with the next release of e-h.
+/// (https://github.com/rust-embedded/embedded-hal/pull/328)
 #[cfg(feature = "eh1_0_alpha")]
 pub enum SpiInfallible {}
 
diff --git a/rp2040-hal/src/uart.rs b/rp2040-hal/src/uart.rs
index b6724c3..0bd3f49 100644
--- a/rp2040-hal/src/uart.rs
+++ b/rp2040-hal/src/uart.rs
@@ -532,6 +532,8 @@ impl<D: UartDevice> eh1::Read<u8> for UartPeripheral<Enabled, D> {
 ///
 /// For eh 1.0.0-alpha.6, Infallible doesn't implement spi::Error,
 /// so use a locally defined type instead.
+/// This should be removed with the next release of e-h.
+/// (https://github.com/rust-embedded/embedded-hal/pull/328)
 #[cfg(feature = "eh1_0_alpha")]
 pub enum SerialInfallible {}