diff --git a/clang/www/cxx_status.html b/clang/www/cxx_status.html
index a35e50150a2ab..2618ff930a0e4 100755
--- a/clang/www/cxx_status.html
+++ b/clang/www/cxx_status.html
@@ -926,7 +926,14 @@ <h2 id="cxx20">C++20 implementation status</h2>
       </tr>
       <tr>
         <td><a href="https://wg21.link/p1857r3">P1857R3</a></td>
-        <td class="none" align="center">No</td>
+        <td class="partial" align="center">
+          <details>
+            <summary>Clang 21 (Partial)</summary>
+            The restriction that "[a] module directive may only appear
+            as the first preprocessing tokens in a file" is enforced
+            starting in Clang 21.
+          </details>
+        </td>
       </tr>
       <tr>
         <td><a href="https://wg21.link/p2115r0">P2115R0</a></td>