Index: evdev.c
===================================================================
RCS file: /cvs/xorg/xc/programs/Xserver/hw/xfree86/input/evdev/evdev.c,v
retrieving revision 1.9
diff -u -r1.9 evdev.c
--- evdev.c	28 Jul 2005 01:48:14 -0000	1.9
+++ evdev.c	12 Sep 2005 16:10:07 -0000
@@ -139,6 +139,8 @@
                     PostButtonClicks(pInfo, wheel_down_button, -value);
                 break;
 
+            case REL_Z:
+                value = -value;
             case REL_HWHEEL:
                 if (value > 0)
                     PostButtonClicks(pInfo, wheel_right_button, value);