diff --git a/mozilla/content/shared/public/nsXULAtomList.h b/mozilla/content/shared/public/nsXULAtomList.h
index db81bb1829c..0cb5de8129a 100644
--- a/mozilla/content/shared/public/nsXULAtomList.h
+++ b/mozilla/content/shared/public/nsXULAtomList.h
@@ -67,6 +67,7 @@ XUL_ATOM(treecolgroup, "treecolgroup") // A column group in the tree view
 XUL_ATOM(treefoot, "treefoot") // The footer of the tree view
 XUL_ATOM(treepusher, "treepusher") // A column pusher (left or right) for the tree view
 XUL_ATOM(scrollbarlist, "scrollbarlist") // An atom for internal use by the tree view
+XUL_ATOM(indent, "indent") // indicates that a cell should be indented
 
 XUL_ATOM(open, "open") // Whether or not a menu, tree, etc. is open
 
diff --git a/mozilla/layout/xul/content/src/nsXULAtomList.h b/mozilla/layout/xul/content/src/nsXULAtomList.h
index db81bb1829c..0cb5de8129a 100644
--- a/mozilla/layout/xul/content/src/nsXULAtomList.h
+++ b/mozilla/layout/xul/content/src/nsXULAtomList.h
@@ -67,6 +67,7 @@ XUL_ATOM(treecolgroup, "treecolgroup") // A column group in the tree view
 XUL_ATOM(treefoot, "treefoot") // The footer of the tree view
 XUL_ATOM(treepusher, "treepusher") // A column pusher (left or right) for the tree view
 XUL_ATOM(scrollbarlist, "scrollbarlist") // An atom for internal use by the tree view
+XUL_ATOM(indent, "indent") // indicates that a cell should be indented
 
 XUL_ATOM(open, "open") // Whether or not a menu, tree, etc. is open