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-rw-r--r--src/tag.sml1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/tag.sml b/src/tag.sml
index c61fc23f..74f195a9 100644
--- a/src/tag.sml
+++ b/src/tag.sml
@@ -153,6 +153,7 @@ fun tag file =
val count = foldl (fn ((d, _), count) =>
case d of
DCon (_, n, _, _) => Int.max (n, count)
+ | DDatatype (_, n, _) => Int.max (n, count)
| DVal (_, n, _, _, _) => Int.max (n, count)
| DValRec vis => foldl (fn ((_, n, _, _, _), count) => Int.max (n, count)) count vis
| DExport _ => count) 0 file