diff --git a/index.bs b/index.bs
index db579fb..b6cd2bf 100644
--- a/index.bs
+++ b/index.bs
@@ -375,6 +375,11 @@ The following is an informative summary of the format specifiers processed by th
     <td>Applies provided CSS</td>
     <td>n/a</td>
   </tr>
+  <tr>
+    <td>`%%`</td>
+    <td>Escapes the `%` specifier</td>
+    <td>n/a</td>
+  </tr>
 </table>
 
 <h3 id="printer" abstract-op lt="Printer">Printer(|logLevel|, |args|[, |options|])</h3>