diff --git a/fetch.bs b/fetch.bs
index 007ca829f..3c55e586d 100755
--- a/fetch.bs
+++ b/fetch.bs
@@ -9440,7 +9440,7 @@ method steps are:
  <a>HTTP(S) scheme</a>, then throw a {{TypeError}}.
 
  <li><p>If <var>request</var>'s <a for=request>URL</a> is not a <a>potentially trustworthy URL</a>,
- then throw a {{TypeError}}.
+ then throw a {{SecurityError}}.
 
  <li>
   <p>If <var>request</var>'s <a for=request>body</a> is not null, and <var>request</var>'s