diff --git a/src/satman/main.rs b/src/satman/main.rs
index b05715f..940947e 100644
--- a/src/satman/main.rs
+++ b/src/satman/main.rs
@@ -82,7 +82,7 @@ macro_rules! forward {
 
 fn process_aux_packet(_repeaters: &mut [repeater::Repeater],
         _routing_table: &mut drtio_routing::RoutingTable, _rank: &mut u8,
-        packet: drtioaux::Packet, timer: GlobalTimer, i2c: I2c) -> Result<(), drtioaux::Error<!>> {
+        packet: drtioaux::Packet, timer: GlobalTimer, i2c: I2c) -> Result<(), drtioaux::Error> {
     // In the code below, *_chan_sel_write takes an u8 if there are fewer than 256 channels,
     // and u16 otherwise; hence the `as _` conversion.
     match packet {
diff --git a/src/satman/repeater.rs b/src/satman/repeater.rs
index 33e65e8..6411d47 100644
--- a/src/satman/repeater.rs
+++ b/src/satman/repeater.rs
@@ -168,7 +168,7 @@ impl Repeater {
         }
     }
 
-    fn recv_aux_timeout(&self, timeout: u32, timer: GlobalTimer) -> Result<drtioaux::Packet, drtioaux::Error<!>> {
+    fn recv_aux_timeout(&self, timeout: u32, timer: GlobalTimer) -> Result<drtioaux::Packet, drtioaux::Error> {
         let max_time = timer.get_time() + Milliseconds(timeout);
         loop {
             if !rep_link_rx_up(self.repno) {
@@ -185,7 +185,7 @@ impl Repeater {
         }
     }
 
-    pub fn aux_forward(&self, request: &drtioaux::Packet, timer: GlobalTimer) -> Result<(), drtioaux::Error<!>> {
+    pub fn aux_forward(&self, request: &drtioaux::Packet, timer: GlobalTimer) -> Result<(), drtioaux::Error> {
         if self.state != RepeaterState::Up {
             return Err(drtioaux::Error::LinkDown);
         }
@@ -195,7 +195,7 @@ impl Repeater {
         Ok(())
     }
 
-    pub fn sync_tsc(&self, timer: GlobalTimer) -> Result<(), drtioaux::Error<!>> {
+    pub fn sync_tsc(&self, timer: GlobalTimer) -> Result<(), drtioaux::Error> {
         if self.state != RepeaterState::Up {
             return Ok(());
         }
@@ -216,7 +216,7 @@ impl Repeater {
         }
     }
 
-    pub fn set_path(&self, destination: u8, hops: &[u8; drtio_routing::MAX_HOPS], timer: GlobalTimer) -> Result<(), drtioaux::Error<!>> {
+    pub fn set_path(&self, destination: u8, hops: &[u8; drtio_routing::MAX_HOPS], timer: GlobalTimer) -> Result<(), drtioaux::Error> {
         if self.state != RepeaterState::Up {
             return Ok(());
         }
@@ -232,14 +232,14 @@ impl Repeater {
         Ok(())
     }
 
-    pub fn load_routing_table(&self, routing_table: &drtio_routing::RoutingTable, timer: GlobalTimer) -> Result<(), drtioaux::Error<!>> {
+    pub fn load_routing_table(&self, routing_table: &drtio_routing::RoutingTable, timer: GlobalTimer) -> Result<(), drtioaux::Error> {
         for i in 0..drtio_routing::DEST_COUNT {
             self.set_path(i as u8, &routing_table.0[i], timer)?;
         }
         Ok(())
     }
 
-    pub fn set_rank(&self, rank: u8, timer: GlobalTimer) -> Result<(), drtioaux::Error<!>> {
+    pub fn set_rank(&self, rank: u8, timer: GlobalTimer) -> Result<(), drtioaux::Error> {
         if self.state != RepeaterState::Up {
             return Ok(());
         }
@@ -253,7 +253,7 @@ impl Repeater {
         Ok(())
     }
 
-    pub fn rtio_reset(&self, timer: GlobalTimer) -> Result<(), drtioaux::Error<!>> {
+    pub fn rtio_reset(&self, timer: GlobalTimer) -> Result<(), drtioaux::Error> {
         let repno = self.repno as usize;
         unsafe { (csr::DRTIOREP[repno].reset_write)(1); }
         timer.delay_us(100);