diff --git a/artiq/firmware/libdrtioaux/lib.rs b/artiq/firmware/libdrtioaux/lib.rs
index 84c9215f3..6ac21fe36 100644
--- a/artiq/firmware/libdrtioaux/lib.rs
+++ b/artiq/firmware/libdrtioaux/lib.rs
@@ -320,7 +320,8 @@ pub mod hw {
         }
     }
 
-    pub fn recv_timeout(timeout_ms: u64) -> io::Result<Packet> {
+    pub fn recv_timeout(timeout_ms: Option<u64>) -> io::Result<Packet> {
+        let timeout_ms = timeout_ms.unwrap_or(10);
         let limit = board::clock::get_ms() + timeout_ms;
         while board::clock::get_ms() < limit {
             match recv() {
diff --git a/artiq/firmware/runtime/moninj.rs b/artiq/firmware/runtime/moninj.rs
index b2fa5369c..2bce8da1a 100644
--- a/artiq/firmware/runtime/moninj.rs
+++ b/artiq/firmware/runtime/moninj.rs
@@ -39,7 +39,7 @@ fn read_probe_drtio(channel: u16, probe: u8) -> u32 {
     if rtio_mgt::drtio::link_is_running() {
         let request = drtioaux::Packet::MonitorRequest { channel: channel, probe: probe };
         drtioaux::hw::send(&request).unwrap();
-        match drtioaux::hw::recv_timeout(10) {
+        match drtioaux::hw::recv_timeout(None) {
             Ok(drtioaux::Packet::MonitorReply { value }) => return value,
             Ok(_) => error!("received unexpected aux packet"),
             Err(e) => error!("aux packet error ({})", e)
@@ -123,7 +123,7 @@ fn read_injection_status_drtio(channel: u16, overrd: u8) -> u8 {
             overrd: overrd
         };
         drtioaux::hw::send(&request).unwrap();
-        match drtioaux::hw::recv_timeout(10) {
+        match drtioaux::hw::recv_timeout(None) {
             Ok(drtioaux::Packet::InjectionStatusReply { value }) => return value,
             Ok(_) => error!("received unexpected aux packet"),
             Err(e) => error!("aux packet error ({})", e)
diff --git a/artiq/firmware/runtime/rtio_mgt.rs b/artiq/firmware/runtime/rtio_mgt.rs
index 76e88e080..62de87468 100644
--- a/artiq/firmware/runtime/rtio_mgt.rs
+++ b/artiq/firmware/runtime/rtio_mgt.rs
@@ -169,7 +169,7 @@ pub mod drtio {
             io.sleep(200).unwrap();
             if link_is_running() {
                 drtioaux::hw::send(&drtioaux::Packet::RtioErrorRequest).unwrap();
-                match drtioaux::hw::recv_timeout(10) {
+                match drtioaux::hw::recv_timeout(None) {
                     Ok(drtioaux::Packet::RtioNoErrorReply) => (),
                     Ok(drtioaux::Packet::RtioErrorCollisionReply) => error!("RTIO collision (in satellite)"),
                     Ok(drtioaux::Packet::RtioErrorBusyReply) => error!("RTIO busy (in satellite)"),