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-rw-r--r--lib/stdlib/src/filename.erl2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/stdlib/src/filename.erl b/lib/stdlib/src/filename.erl
index 59d6de5d10..0c50eb34e6 100644
--- a/lib/stdlib/src/filename.erl
+++ b/lib/stdlib/src/filename.erl
@@ -878,7 +878,7 @@ filter_options(_Base, [], Result) ->
%% Gets the source file given path of object code and module name.
get_source_file(Obj, Mod, Rules) ->
- source_by_rules(dirname(Obj), packages:last(Mod), Rules).
+ source_by_rules(dirname(Obj), atom_to_list(Mod), Rules).
source_by_rules(Dir, Base, [{From, To}|Rest]) ->
case try_rule(Dir, Base, From, To) of