diff --git a/CHANGES.md b/CHANGES.md
index e12c92d..8b2fe53 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,9 @@
 # Change Log / Release Notes
 
+## unknown
+
+  * Fixed type of `xrrUpdateConfiguration`
+
 ## 1.9.2 (2020-08-25)
 
   * Make sure that X11 search paths determined by autoconf are actually passed
diff --git a/Graphics/X11/Xrandr.hsc b/Graphics/X11/Xrandr.hsc
index 3075f28..4e7144c 100644
--- a/Graphics/X11/Xrandr.hsc
+++ b/Graphics/X11/Xrandr.hsc
@@ -460,10 +460,10 @@ xrrSelectInput dpy window mask = cXRRSelectInput dpy window (fromIntegral mask)
 foreign import ccall "XRRSelectInput"
   cXRRSelectInput :: Display -> Window -> CInt -> IO ()
 
-xrrUpdateConfiguration :: XEvent -> IO CInt
+xrrUpdateConfiguration :: XEventPtr -> IO CInt
 xrrUpdateConfiguration = cXRRUpdateConfiguration
 foreign import ccall "XRRUpdateConfiguration"
-  cXRRUpdateConfiguration :: XEvent -> IO CInt
+  cXRRUpdateConfiguration :: XEventPtr -> IO CInt
 
 xrrRotations :: Display -> CInt -> IO (Rotation, Rotation)
 xrrRotations dpy screen =