diff --git a/docs/examples/form-equation-input.html b/docs/examples/form-equation-input.html
index dafa1b3..6d8012b 100644
--- a/docs/examples/form-equation-input.html
+++ b/docs/examples/form-equation-input.html
@@ -106,7 +106,7 @@
             </table>
         </form>
         <script>
-            MJXGUI.createEquationInput('#equation');
+            MJXGUI.createEquationInput('.equation-input');
         </script>
         <script>
             function findGetParameter(parameterName) {