1 files changed, 1 insertions, 1 deletions

diff --git a/lisp/iswitchb.el b/lisp/iswitchb.el
index c782295c794..70dda5442d5 100644
--- a/lisp/iswitchb.el
+++ b/lisp/iswitchb.el
@@ -1119,7 +1119,7 @@ If BUFFER is visible in the current frame, return nil."
   (interactive)
   (let ((blist (iswitchb-get-buffers-in-frames 'current)))
     ;; If the buffer is visible in current frame, return nil
-    (when (member buffer blist)
+    (unless (member buffer blist)
       ;; maybe in other frame or icon
       (get-buffer-window buffer 0) ; better than 'visible
       )))