diff --git a/ui/vnc.c b/ui/vnc.c
index 864342e..172b988 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -2736,5 +2736,6 @@ int vnc_display_open(DisplayState *ds, const char *display)
             vs->display = dpy;
         }
     }
+    socket_set_nonblock(vs->lsock);
     return qemu_set_fd_handler2(vs->lsock, NULL, vnc_listen_read, NULL, vs);
 }