diff --git a/docs/README.md b/docs/README.md
index 65c7ebe4ed..4b866a043b 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -1044,7 +1044,7 @@ $ http POST pie.dev/post < files/data.json
 ## Forms
 
 Submitting forms is very similar to sending [JSON](#json) requests.
-Often the only difference is in adding the `--form, -f` option, which ensures that data fields are serialized as, and `Content-Type` is set to `application/x-www-form-urlencoded; charset=utf-8`.
+Often the only difference is in adding the `--form, -f` option, which ensures that data fields are serialized as key-value tuples separated by '&', with a '=' between the key and the value. In addition `Content-Type` is set to `application/x-www-form-urlencoded; charset=utf-8`.
 It is possible to make form data the implicit content type instead of JSON via the [config](#config) file.
 
 ### Regular forms