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-rw-r--r--lib/stdlib/src/gen_statem.erl1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/stdlib/src/gen_statem.erl b/lib/stdlib/src/gen_statem.erl
index ae50651c06..cacc932ec4 100644
--- a/lib/stdlib/src/gen_statem.erl
+++ b/lib/stdlib/src/gen_statem.erl
@@ -290,6 +290,7 @@
[init/1, % One may use enter_loop/5,6,7 instead
format_status/2, % Has got a default implementation
terminate/3, % Has got a default implementation
+ code_change/4, % Only needed by advanced soft upgrade
%%
state_name/3, % Example for callback_mode() =:= state_functions:
%% there has to be a StateName/3 callback function