diff --git a/eyebrowse.el b/eyebrowse.el
index e17e6fd..0b0cdbb 100644
--- a/eyebrowse.el
+++ b/eyebrowse.el
@@ -219,8 +219,9 @@ If FRAME is nil, use current frame.  TYPE can be any of
   "Initialize Eyebrowse for the current frame."
   (eyebrowse--set 'last-slot 1 frame)
   (eyebrowse--set 'current-slot 1 frame)
-  (eyebrowse--insert-in-window-config-list
-   (eyebrowse--current-window-config 1) frame))
+  (unless (eyebrowse--window-config-present-p 1 frame)
+    (eyebrowse--insert-in-window-config-list
+     (eyebrowse--current-window-config 1) frame)))
 
 (defun eyebrowse--update-window-config-element (new-element)
   "Replace the old element with NEW-ELEMENT in the window config list.