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-rw-r--r--erts/preloaded/src/zlib.erl2
1 files changed, 2 insertions, 0 deletions
diff --git a/erts/preloaded/src/zlib.erl b/erts/preloaded/src/zlib.erl
index 2c9d55f50c..3d85533b80 100644
--- a/erts/preloaded/src/zlib.erl
+++ b/erts/preloaded/src/zlib.erl
@@ -30,6 +30,8 @@
compress/1,uncompress/1,zip/1,unzip/1,
gzip/1,gunzip/1]).
+-export_type([zstream/0]).
+
%% flush argument encoding
-define(Z_NO_FLUSH, 0).
-define(Z_SYNC_FLUSH, 2).