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-rw-r--r--erts/emulator/beam/erl_term.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/erts/emulator/beam/erl_term.h b/erts/emulator/beam/erl_term.h
index fde90997e3..72946d9ddf 100644
--- a/erts/emulator/beam/erl_term.h
+++ b/erts/emulator/beam/erl_term.h
@@ -299,7 +299,7 @@ _ET_DECLARE_CHECKED(Uint,atom_val,Eterm)
#define atom_val(x) _ET_APPLY(atom_val,(x))
/* header (arityval or thing) access methods */
-#define _make_header(sz,tag) ((Uint)(((sz) << _HEADER_ARITY_OFFS) + (tag)))
+#define _make_header(sz,tag) ((Uint)(((Uint)(sz) << _HEADER_ARITY_OFFS) + (tag)))
#define is_header(x) (((x) & _TAG_PRIMARY_MASK) == TAG_PRIMARY_HEADER)
//#define _unchecked_header_arity(x) ((x) >> _HEADER_ARITY_OFFS)
#define _unchecked_header_arity(x) \