diff --git a/spec/amp-html-format.md b/spec/amp-html-format.md
index 0047b6e0b9eb6..6451358992c1b 100644
--- a/spec/amp-html-format.md
+++ b/spec/amp-html-format.md
@@ -168,11 +168,11 @@ HTML tags can be used unchanged in AMP HTML. Certain tags have equivalent custom
form |
- Allowed. Require including [amp-form extension](../extensions/amp-form/amp-form.md). |
+ Allowed. Require including amp-form extension. |
input elements |
- Mostly Allowed with [exception of some input types](../extensions/amp-form/amp-form.md#inputs), namely, `input[type=image]`, `input[type=button]`, `input[type=password]`, `input[type=file]` are invalid. Related tags are also allowed: `fieldset`, `label` |
+ Mostly Allowed with exception of some input types, namely, <input[type=image]> , <input[type=button]> , <input[type=password]> , <input[type=file]> are invalid. Related tags are also allowed: <fieldset> , <label> |
button |