diff --git a/templates/zerver/search_operators.html b/templates/zerver/search_operators.html
index cda8fae0b3..e0930dd146 100644
--- a/templates/zerver/search_operators.html
+++ b/templates/zerver/search_operators.html
@@ -60,6 +60,10 @@
         <td class="operator"><span class="operator_value">keyword</span></td>
         <td class="definition">Search for <span class="operator_value">keyword</span> in the topic or message content</td>
       </tr>
+      <tr>
+        <td class="operator">-topic:<span class="operator_value">topic</span></td>
+        <td class="definition">Exclude messages with topic <span class="operator_value">topic</span></td>
+      </tr>
     </table>
     <p>You can use any combination of these search operators in a
     single query.  For example:</p>