diff --git a/minadbd/usb_linux_client.c b/minadbd/usb_linux_client.c
index c135d63..29bab15 100644
--- a/minadbd/usb_linux_client.c
+++ b/minadbd/usb_linux_client.c
@@ -388,7 +388,7 @@
         ret = adb_read(bulk_out, buf + count, length - count);
         if (ret < 0) {
             if (errno != EINTR) {
-                D("[ bulk_read failed fd=%d length=%d count=%d ]\n",
+                D("[ bulk_read failed fd=%d length=%zu count=%zu ]\n",
                                            bulk_out, length, count);
                 return ret;
             }