diff --git a/src/device/usbd.c b/src/device/usbd.c
index ddd99d7f1..125aa351c 100644
--- a/src/device/usbd.c
+++ b/src/device/usbd.c
@@ -421,7 +421,7 @@ void tud_task (void)
         uint8_t const epnum   = tu_edpt_number(ep_addr);
         uint8_t const ep_dir  = tu_edpt_dir(ep_addr);
 
-        TU_LOG2("  Endpoint: 0x%02X, Bytes: %ld\r\n", ep_addr, event.xfer_complete.len);
+        TU_LOG2("  Endpoint: 0x%02X, Bytes: %lu\r\n", ep_addr, event.xfer_complete.len);
 
         _usbd_dev.ep_status[epnum][ep_dir].busy = false;