diff --git a/changelog.md b/changelog.md
index 072932ec..0f24ebf6 100644
--- a/changelog.md
+++ b/changelog.md
@@ -8,6 +8,7 @@ _Bug fixes_
   - Revert the double-UTF-8 encoding workarounds of 0.36 (#482), as they're no
     longer necessary with xmonad-contrib master, and aren't needed with any
     released version of xmonad-contrib either.
+  - Fix slow reactions to SIGUSR1/2 signals (reposition, change screen).
 
 ## Version 0.37 (November, 2020)
 
diff --git a/src/Xmobar/X11/Draw.hs b/src/Xmobar/X11/Draw.hs
index 6c00ee69..6044effb 100644
--- a/src/Xmobar/X11/Draw.hs
+++ b/src/Xmobar/X11/Draw.hs
@@ -89,7 +89,7 @@ drawInWin wr@(Rectangle _ _ wid ht) ~[left,center,right] = do
     liftIO $ freeGC d gc
     liftIO $ freePixmap d p
     -- resync
-    liftIO $ sync d True
+    liftIO $ sync d False
 
 verticalOffset :: (Integral b, Integral a, MonadIO m) =>
                   a -> Widget -> XFont -> Int -> Config -> m b
diff --git a/src/Xmobar/X11/Window.hs b/src/Xmobar/X11/Window.hs
index 796e2130..6de8e66b 100644
--- a/src/Xmobar/X11/Window.hs
+++ b/src/Xmobar/X11/Window.hs
@@ -69,6 +69,7 @@ repositionWin d win fs c = do
       r = setPosition c (position c) srs (fromIntegral ht)
   moveResizeWindow d win (rect_x r) (rect_y r) (rect_width r) (rect_height r)
   setStruts r c d win srs
+  sync d False
   return r
 
 fi :: (Integral a, Num b) => a -> b