--- a/Bookmark.st	Sun Sep 08 16:21:27 2019 +0200
+++ b/Bookmark.st	Sun Sep 08 16:26:36 2019 +0200
@@ -675,7 +675,7 @@
 
     | index |
     index := children identityIndexOf: child.
-    index = 1 ifTrue:[^self].
+    index == 1 ifTrue:[^self].
     self removeIndex: index. 
     self add: child beforeIndex: index - 1.