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-rw-r--r--lib/stdlib/src/gb_trees.erl4
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/stdlib/src/gb_trees.erl b/lib/stdlib/src/gb_trees.erl
index 6ad861ff5b..258713c90f 100644
--- a/lib/stdlib/src/gb_trees.erl
+++ b/lib/stdlib/src/gb_trees.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2001-2011. All Rights Reserved.
+%% Copyright Ericsson AB 2001-2012. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
@@ -152,6 +152,8 @@
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Some types.
+-export_type([iter/0]).
+
-type gb_tree_node() :: 'nil' | {_, _, _, _}.
-opaque iter() :: [gb_tree_node()].