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-rw-r--r--erts/emulator/beam/erl_term.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/erts/emulator/beam/erl_term.h b/erts/emulator/beam/erl_term.h
index cff012d5d1..602aab46dc 100644
--- a/erts/emulator/beam/erl_term.h
+++ b/erts/emulator/beam/erl_term.h
@@ -1027,6 +1027,7 @@ _ET_DECLARE_CHECKED(struct erl_node_*,external_ref_node,Eterm)
#define is_map_header(x) (((x) & (_TAG_HEADER_MASK)) == _TAG_HEADER_MAP)
#define is_map(x) (is_boxed((x)) && is_map_header(*boxed_val(x)))
+#define is_not_map(x) (!is_map(x))
#define is_map_rel(RTERM,BASE) is_map(rterm2wterm(RTERM,BASE))
/* number tests */