diff --git a/ui/vnc.c b/ui/vnc.c
index 6c9d4f3492..aac93f0e17 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -935,6 +935,9 @@ static int vnc_update_client(VncState *vs, int has_dirty, bool sync)
         }
 
         vnc_job_push(job);
+        if (sync) {
+            vnc_jobs_join(vs);
+        }
         vs->force_update = 0;
         return n;
     }