diff --git a/drivers/usb/xhcid/src/xhci/irq_reactor.rs b/drivers/usb/xhcid/src/xhci/irq_reactor.rs
index 254065373a..2b79fe4c88 100644
--- a/drivers/usb/xhcid/src/xhci/irq_reactor.rs
+++ b/drivers/usb/xhcid/src/xhci/irq_reactor.rs
@@ -435,7 +435,7 @@ impl<const N: usize> IrqReactor<N> {
                 .inspect(|req| trace!("Received request: {:X?}", req)),
         );
     }
-    fn acknowledge(&mut self, trb: Trb) {
+    fn acknowledge(&mut self, mut trb: Trb) {
         //TODO: handle TRBs without an attached state
 
         trace!("ACK TRB {:X?}", trb);
@@ -565,7 +565,7 @@ impl<const N: usize> IrqReactor<N> {
             trb
         );
     }
-    fn acknowledge_failed_transfer_trbs(&mut self, trb: Trb) {
+    fn acknowledge_failed_transfer_trbs(&mut self, mut trb: Trb) {
         let mut index = 0;
 
         loop {