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-rw-r--r--src/mono.sml1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/mono.sml b/src/mono.sml
index 3885c789..8c69443a 100644
--- a/src/mono.sml
+++ b/src/mono.sml
@@ -60,6 +60,7 @@ datatype exp' =
| ERel of int
| ENamed of int
| ECon of datatype_kind * patCon * exp option
+ | ESome of typ * exp
| EFfi of string * string
| EFfiApp of string * string * exp list
| EApp of exp * exp