switch-window.el emacs22

diff --git a/switch-window.el b/switch-window.el
index 1f63598..d2c7b3c 100644
--- a/switch-window.el
+++ b/switch-window.el
@@ -95,7 +95,8 @@ from-current-window is not nil"
             (lines-before (/ increased-lines 2))
             (margin-left (/ w h) ))
        ;; increase to maximum switch-window-increase
-       (text-scale-increase scale)
+        (when (> emacs-major-version 22)
+          (text-scale-increase scale))
        ;; make it so that the huge number appears centered
        (dotimes (i lines-before) (insert "\n"))
        (dotimes (i margin-left)  (insert " "))