diff --git a/dix/getevents.c b/dix/getevents.c
index 4e62507aa..71d83c4ba 100644
--- a/dix/getevents.c
+++ b/dix/getevents.c
@@ -896,9 +896,9 @@ scale_to_desktop(DeviceIntPtr dev, ValuatorMask *mask,
 
     /* scale x&y to desktop coordinates */
     *screenx = rescaleValuatorAxis(x, dev->valuator->axes + 0, NULL,
-                                   screenInfo.x, screenInfo.width);
+                                   screenInfo.x, screenInfo.width - 1);
     *screeny = rescaleValuatorAxis(y, dev->valuator->axes + 1, NULL,
-                                   screenInfo.y, screenInfo.height);
+                                   screenInfo.y, screenInfo.height - 1);
 
     *devx = x;
     *devy = y;