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-rw-r--r--lib/compiler/src/sys_core_fold.erl2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/compiler/src/sys_core_fold.erl b/lib/compiler/src/sys_core_fold.erl
index 6f8279f65e..4529c01b69 100644
--- a/lib/compiler/src/sys_core_fold.erl
+++ b/lib/compiler/src/sys_core_fold.erl
@@ -1242,7 +1242,7 @@ is_subst(_) -> false.
%% to force renaming if variables in the scope occurs as pattern
%% variables.
-sub_new() -> #sub{v=orddict:new(),s=gb_trees:empty(),t=[]}.
+sub_new() -> #sub{v=orddict:new(),s=gb_sets:empty(),t=[]}.
sub_new(#sub{}=Sub) ->
Sub#sub{v=orddict:new(),t=[]}.