diff --git a/README.md b/README.md
index 66cb91a..57c51c5 100644
--- a/README.md
+++ b/README.md
@@ -134,7 +134,8 @@ See [example_test.go](./example_test.go) for more examples.
 
 #### Untagged Signing
 
-`cose.Sign1` (above) generated a tagged CBOR object. You need to create a
+`cose.Sign1` (above) generated a COSE_Sign1_Tagged object. To serialize a
+COSE_Sign1 instead (i.e., without the outer tag), you need to create a
 `Sign1Message` by hand, and set its `Untagged` flag before signing:
 
 ```go