diff -Naur xfwm4-4.8.2-orig//src/cycle.c xfwm4-4.8.2/src/cycle.c
--- xfwm4-4.8.2-orig//src/cycle.c	2011-09-22 21:12:34.000000000 +0200
+++ xfwm4-4.8.2/src/cycle.c	2012-01-26 17:53:45.000000000 +0100
@@ -192,7 +192,7 @@
     ClientCycleData *passdata;
     Client *c, *removed;
     eventFilterStatus status;
-    KeyCode cancel;
+    KeyCode cancel, left, right;
     int key, modifier;
     gboolean key_pressed, cycling, gone;
 
@@ -208,6 +208,8 @@
     screen_info = c->screen_info;
     display_info = screen_info->display_info;
     cancel = screen_info->params->keys[KEY_CANCEL].keycode;
+    left = screen_info->params->keys[KEY_LEFT].keycode;
+    right = screen_info->params->keys[KEY_RIGHT].keycode;
     modifier = screen_info->params->keys[KEY_CYCLE_WINDOWS].modifier;
     status = EVENT_FILTER_STOP;
     removed = NULL;
@@ -249,12 +251,12 @@
                         c2 = tabwinSelectHead (passdata->tabwin);
                         cycling = FALSE;
                     }
-                    else if (key == KEY_CYCLE_REVERSE_WINDOWS)
+                    else if (key == KEY_CYCLE_REVERSE_WINDOWS || xevent->xkey.keycode == left)
                     {
                         TRACE ("Cycle: previous");
                         c2 = tabwinSelectPrev(passdata->tabwin);
                     }
-                    else if (key == KEY_CYCLE_WINDOWS)
+                    else if (key == KEY_CYCLE_WINDOWS || xevent->xkey.keycode == right)
                     {
                         TRACE ("Cycle: next");
                         c2 = tabwinSelectNext(passdata->tabwin);