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-rw-r--r--plugins/extraction/common.ml1
-rw-r--r--plugins/extraction/haskell.ml1
2 files changed, 2 insertions, 0 deletions
diff --git a/plugins/extraction/common.ml b/plugins/extraction/common.ml
index 742dca612a..29da12de40 100644
--- a/plugins/extraction/common.ml
+++ b/plugins/extraction/common.ml
@@ -678,6 +678,7 @@ let check_extract_string () =
try
let string_type = match lang () with
| Ocaml -> "string"
+ | Haskell -> "Prelude.String"
| _ -> raise Not_found
in
String.equal (find_custom @@ string_type_ref ()) string_type
diff --git a/plugins/extraction/haskell.ml b/plugins/extraction/haskell.ml
index bde37bcae7..eef050efbd 100644
--- a/plugins/extraction/haskell.ml
+++ b/plugins/extraction/haskell.ml
@@ -171,6 +171,7 @@ let rec pp_expr par env args =
assert (List.is_empty args);
begin match a with
| _ when is_native_char c -> pp_native_char c
+ | _ when is_native_string c -> pp_native_string c
| [] -> pp_global Cons r
| [a] ->
pp_par par (pp_global Cons r ++ spc () ++ pp_expr true env [] a)