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-rw-r--r--lib/stdlib/src/supervisor.erl2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/stdlib/src/supervisor.erl b/lib/stdlib/src/supervisor.erl
index 79bb810682..f5d5441184 100644
--- a/lib/stdlib/src/supervisor.erl
+++ b/lib/stdlib/src/supervisor.erl
@@ -33,6 +33,8 @@
-export([init/1, handle_call/3, handle_info/2, terminate/2, code_change/3]).
-export([handle_cast/2]).
+-export_type([child_spec/0, strategy/0]).
+
%%--------------------------------------------------------------------------
-type child_id() :: pid() | 'undefined'.