diff --git a/src/portable/mentor/musb/hcd_musb.c b/src/portable/mentor/musb/hcd_musb.c
index 9eb2e005e..5be67a186 100644
--- a/src/portable/mentor/musb/hcd_musb.c
+++ b/src/portable/mentor/musb/hcd_musb.c
@@ -822,6 +822,14 @@ bool hcd_edpt_xfer(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr, uint8_t *b
   return ret;
 }
 
+bool hcd_edpt_abort_xfer(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr) {
+  (void) rhport;
+  (void) dev_addr;
+  (void) ep_addr;
+  // TODO not implemented yet
+  return false;
+}
+
 // clear stall, data toggle is also reset to DATA0
 bool hcd_edpt_clear_stall(uint8_t dev_addr, uint8_t ep_addr)
 {
diff --git a/src/portable/nxp/khci/hcd_khci.c b/src/portable/nxp/khci/hcd_khci.c
index f6029ee0d..6784049c5 100644
--- a/src/portable/nxp/khci/hcd_khci.c
+++ b/src/portable/nxp/khci/hcd_khci.c
@@ -562,6 +562,14 @@ bool hcd_edpt_xfer(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr, uint8_t *
   return true;
 }
 
+bool hcd_edpt_abort_xfer(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr) {
+  (void) rhport;
+  (void) dev_addr;
+  (void) ep_addr;
+  // TODO not implemented yet
+  return false;
+}
+
 bool hcd_edpt_clear_stall(uint8_t dev_addr, uint8_t ep_addr)
 {
   if (!tu_edpt_number(ep_addr)) return true;
diff --git a/src/portable/ohci/ohci.c b/src/portable/ohci/ohci.c
index 3f702d22c..228c43df6 100644
--- a/src/portable/ohci/ohci.c
+++ b/src/portable/ohci/ohci.c
@@ -543,6 +543,14 @@ bool hcd_edpt_xfer(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr, uint8_t *
   return true;
 }
 
+bool hcd_edpt_abort_xfer(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr) {
+  (void) rhport;
+  (void) dev_addr;
+  (void) ep_addr;
+  // TODO not implemented yet
+  return false;
+}
+
 bool hcd_edpt_clear_stall(uint8_t dev_addr, uint8_t ep_addr)
 {
   ohci_ed_t * const p_ed = ed_from_addr(dev_addr, ep_addr);
diff --git a/src/portable/raspberrypi/pio_usb/hcd_pio_usb.c b/src/portable/raspberrypi/pio_usb/hcd_pio_usb.c
index 264af2e7a..fa285327c 100644
--- a/src/portable/raspberrypi/pio_usb/hcd_pio_usb.c
+++ b/src/portable/raspberrypi/pio_usb/hcd_pio_usb.c
@@ -138,6 +138,14 @@ bool hcd_edpt_xfer(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr, uint8_t *
   return pio_usb_host_endpoint_transfer(pio_rhport, dev_addr, ep_addr, buffer, buflen);
 }
 
+bool hcd_edpt_abort_xfer(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr) {
+  (void) rhport;
+  (void) dev_addr;
+  (void) ep_addr;
+  // TODO not implemented yet
+  return false;
+}
+
 bool hcd_setup_send(uint8_t rhport, uint8_t dev_addr, uint8_t const setup_packet[8])
 {
   uint8_t const pio_rhport = RHPORT_PIO(rhport);
diff --git a/src/portable/raspberrypi/rp2040/hcd_rp2040.c b/src/portable/raspberrypi/rp2040/hcd_rp2040.c
index 02f9968a7..5091fa907 100644
--- a/src/portable/raspberrypi/rp2040/hcd_rp2040.c
+++ b/src/portable/raspberrypi/rp2040/hcd_rp2040.c
@@ -576,6 +576,14 @@ bool hcd_edpt_xfer(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr, uint8_t *
   return true;
 }
 
+bool hcd_edpt_abort_xfer(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr) {
+  (void) rhport;
+  (void) dev_addr;
+  (void) ep_addr;
+  // TODO not implemented yet
+  return false;
+}
+
 bool hcd_setup_send(uint8_t rhport, uint8_t dev_addr, uint8_t const setup_packet[8])
 {
   (void) rhport;
diff --git a/src/portable/renesas/rusb2/hcd_rusb2.c b/src/portable/renesas/rusb2/hcd_rusb2.c
index 65bbc656b..0a75d0b47 100644
--- a/src/portable/renesas/rusb2/hcd_rusb2.c
+++ b/src/portable/renesas/rusb2/hcd_rusb2.c
@@ -710,6 +710,14 @@ bool hcd_edpt_xfer(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr, uint8_t *b
   return r;
 }
 
+bool hcd_edpt_abort_xfer(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr) {
+  (void) rhport;
+  (void) dev_addr;
+  (void) ep_addr;
+  // TODO not implemented yet
+  return false;
+}
+
 bool hcd_edpt_clear_stall(uint8_t dev_addr, uint8_t ep_addr)
 {
   uint16_t volatile *ctr = addr_to_pipectr(dev_addr, ep_addr);