diff --git a/hw/display/qxl-render.c b/hw/display/qxl-render.c
index cc2c2b1dbc5e75e4bd3e278dc4b3ff59aba9a788..bcc5c3701a404e95420e3ddf67a9cb2972fcd31e 100644
--- a/hw/display/qxl-render.c
+++ b/hw/display/qxl-render.c
@@ -138,7 +138,9 @@ static void qxl_render_update_area_unlocked(PCIQXLDevice *qxl)
         if (qemu_spice_rect_is_empty(qxl->dirty+i)) {
             break;
         }
-        if (qxl->dirty[i].left > qxl->dirty[i].right ||
+        if (qxl->dirty[i].left < 0 ||
+            qxl->dirty[i].top < 0 ||
+            qxl->dirty[i].left > qxl->dirty[i].right ||
             qxl->dirty[i].top > qxl->dirty[i].bottom ||
             qxl->dirty[i].right > qxl->guest_primary.surface.width ||
             qxl->dirty[i].bottom > qxl->guest_primary.surface.height) {