2 files changed, 8 insertions, 0 deletions
diff --git a/dhall/src/syntax/binary/decode.rs b/dhall/src/syntax/binary/decode.rs
index 254ab07..c18deb5 100644
--- a/dhall/src/syntax/binary/decode.rs
+++ b/dhall/src/syntax/binary/decode.rs
@@ -98,6 +98,11 @@ fn cbor_value_to_dhall(data: &cbor::Value) -> Result<DecodedExpr, DecodeError> {
                 let l = Label::from(l.as_str());
                 Pi(l, x, y)
             }
+            [U64(3), U64(13), x, y] => {
+                let x = cbor_value_to_dhall(&x)?;
+                let y = cbor_value_to_dhall(&y)?;
+                Completion(x, y)
+            }
             [U64(3), U64(n), x, y] => {
                 let x = cbor_value_to_dhall(&x)?;
                 let y = cbor_value_to_dhall(&y)?;
diff --git a/dhall/src/syntax/binary/encode.rs b/dhall/src/syntax/binary/encode.rs
index 25a545c..867fc9c 100644
--- a/dhall/src/syntax/binary/encode.rs
+++ b/dhall/src/syntax/binary/encode.rs
@@ -164,6 +164,9 @@ where
         ProjectionByExpr(x, y) => {
             ser_seq!(ser; tag(10), expr(x), vec![expr(y)])
         }
+        Completion(x, y) => {
+            ser_seq!(ser; tag(3), tag(13), expr(x), expr(y))
+        }
         Import(import) => serialize_import(ser, import),
         Embed(_) => unimplemented!(
             "An expression with resolved imports cannot be binary-encoded"