diff --git a/hw/qxl.c b/hw/qxl.c
index 7991e70..b34bccf 100644
--- a/hw/qxl.c
+++ b/hw/qxl.c
@@ -1187,7 +1187,7 @@
         }
         d->current_async = orig_io_port;
         qemu_mutex_unlock(&d->async_lock);
-        dprint(d, 2, "start async %d (%d)\n", io_port, val);
+        dprint(d, 2, "start async %d (%"PRId64")\n", io_port, val);
         break;
     default:
         break;
@@ -1303,7 +1303,8 @@
         break;
     }
     case QXL_IO_FLUSH_SURFACES_ASYNC:
-        dprint(d, 1, "QXL_IO_FLUSH_SURFACES_ASYNC (%d) (%s, s#=%d, res#=%d)\n",
+        dprint(d, 1, "QXL_IO_FLUSH_SURFACES_ASYNC"
+                     " (%"PRId64") (%s, s#=%d, res#=%d)\n",
                val, qxl_mode_to_string(d->mode), d->guest_surfaces.count,
                d->num_free_res);
         qxl_spice_flush_surfaces_async(d);