diff --git a/draft-west-http-state-tokens.html b/draft-west-http-state-tokens.html
index f3fccb8..c7b5b5c 100644
--- a/draft-west-http-state-tokens.html
+++ b/draft-west-http-state-tokens.html
@@ -628,7 +628,7 @@ <h1 id="rfc.section.4.2">
 <ul>
 <li>Exactly one member whose key is <samp>key</samp>, and whose value is binary content (<a href="#I-D.ietf-httpbis-header-structure" class="xref">[I-D.ietf-httpbis-header-structure]</a>, Section 3.10) that encodes an key which can be used to generate a signature over outgoing requests.</li>
 <li>Exactly one member whose key is <samp>delivery</samp>, and whose value is one of the following tokens (<a href="#I-D.ietf-httpbis-header-structure" class="xref">[I-D.ietf-httpbis-header-structure]</a>, Section 3.9): <samp>same-origin</samp>, <samp>same-site</samp>, or <samp>cross-site</samp>.  <br><br> If the <samp>delivery</samp> member contains an unknown identifier, the member MUST be ignored.</li>
-<li>Exactly one member whose key is <samp>max-age</samp>, and whose value is an integer (<a href="#I-D.ietf-httpbis-header-structure" class="xref">[I-D.ietf-httpbis-header-structure]</a>, Section 3.6) representing the server&#8217;s desired lifetime for its HTTP State Token.  <br><br> If the <samp>max-age</samp> member contains anything other than a positive integer, the member MUST be ignored.</li>
+<li>Exactly one member whose key is <samp>max-age</samp>, and whose value is an integer (<a href="#I-D.ietf-httpbis-header-structure" class="xref">[I-D.ietf-httpbis-header-structure]</a>, Section 3.6) representing the server&#8217;s desired lifetime for its HTTP State Token.  <br><br> If the <samp>max-age</samp> member contains anything other than a nonnegative integer, the member MUST be ignored.</li>
 </ul>
 <p id="rfc.section.4.2.p.6">User agents will process the <samp>Sec-Http-State-Options</samp> header on incoming responses according to the processing rules described in <a href="#config" class="xref">Section 6</a>.</p>
 <h1 id="rfc.section.4.2.1">
@@ -755,7 +755,7 @@ <h1 id="rfc.section.6">
 <li>
 <samp>header</samp> has a member named <samp>delivery</samp> whose value is not one of the following tokens (Section 3.9 of <a href="#I-D.ietf-httpbis-header-structure" class="xref">[I-D.ietf-httpbis-header-structure]</a>): &#8220;same-origin&#8221;, &#8220;same-site&#8221;, and &#8220;cross-site&#8221;.</li>
 <li>
-<samp>header</samp> has a member named <samp>max-age</samp> whose value is not a positive integer (Section 3.6 of <a href="#I-D.ietf-httpbis-header-structure" class="xref">[I-D.ietf-httpbis-header-structure]</a>).</li>
+<samp>header</samp> has a member named <samp>max-age</samp> whose value is not a nonnegative integer (Section 3.6 of <a href="#I-D.ietf-httpbis-header-structure" class="xref">[I-D.ietf-httpbis-header-structure]</a>).</li>
 </ul>
 </li>
 <li>If <samp>header</samp> has a member named <samp>key</samp>, set <samp>token</samp>&#8217;s <samp>key</samp> to the member&#8217;s value.</li>
diff --git a/draft-west-http-state-tokens.md b/draft-west-http-state-tokens.md
index fd4d330..2e8dca9 100644
--- a/draft-west-http-state-tokens.md
+++ b/draft-west-http-state-tokens.md
@@ -340,7 +340,7 @@ The dictionary MAY contain:
     ({{!I-D.ietf-httpbis-header-structure}}, Section 3.6) representing the server's desired lifetime
     for its HTTP State Token.
 
-    If the `max-age` member contains anything other than a positive integer, the member MUST be
+    If the `max-age` member contains anything other than a nonnegative integer, the member MUST be
     ignored.
 
 User agents will process the `Sec-Http-State-Options` header on incoming responses according to the
@@ -549,7 +549,7 @@ intended to be called after the `Set-Cookie` header is handled in step 11.4 of S
         *   `header` has a member named `delivery` whose value is not one of the following tokens
             (Section 3.9 of {{I-D.ietf-httpbis-header-structure}}): "same-origin", "same-site",
             and "cross-site".
-        *   `header` has a member named `max-age` whose value is not a positive integer (Section 3.6
+        *   `header` has a member named `max-age` whose value is not a nonnegative integer (Section 3.6
             of {{I-D.ietf-httpbis-header-structure}}).
 
     3.  If `header` has a member named `key`, set `token`'s `key` to the member's value.