diff --git a/index.bs b/index.bs
index 00e30a1..d0e136c 100644
--- a/index.bs
+++ b/index.bs
@@ -654,7 +654,7 @@ spec: STRUCTURED-FIELDS; urlPrefix: https://www.rfc-editor.org/rfc/rfc8941.html#
1. If |url|'s scheme is not an HTTP(S) scheme,
then return |url|'s scheme.
- 2. Set |url|’s fragment to the empty string.
+ 2. Set |url|’s fragment to null.
3. Set |url|’s username to the empty string.