diff --git a/compatibility.bs b/compatibility.bs
index d920df5..9c3c494 100644
--- a/compatibility.bs
+++ b/compatibility.bs
@@ -308,7 +308,7 @@ The following <code>-webkit-</code> <a>vendor prefixed</a> properties must be su
       <td><code>'box-sizing'</code></td>
     </tr>
     <tr>
-      <td><code><dfn property lt="-webkit-flex-propdef">-webkit-flex</dfn></code></td>
+      <td><code><dfn property id="propdef--webkit-flex-propdef">-webkit-flex</dfn></code></td>
       <td><code>'flex'</code></td>
     </tr>
     <tr>
@@ -525,7 +525,7 @@ The following <code>-webkit-</code> <a>vendor prefixed</a> keywords must be supp
       <td><code>''flex''</code></td>
     </tr>
     <tr>
-      <td><code><dfn value lt="-webkit-flex-valdef">-webkit-flex</dfn></code></td>
+      <td><code><dfn value id="valdef-flex--webkit-flex-valdef">-webkit-flex</dfn></code></td>
       <td><code>''flex''</code></td>
     </tr>
     <tr>