diff --git a/src/frontend/plotting/x11.c b/src/frontend/plotting/x11.c
index ca468cd24..5a18939d9 100644
--- a/src/frontend/plotting/x11.c
+++ b/src/frontend/plotting/x11.c
@@ -894,7 +894,7 @@ int
 X11_Update(void)
 {
     if (X11_Open)
-        XSync(display, 0);
+        XFlush(display);
     return 0;
 }