diff --git a/mockup/personmock.html b/mockup/personmock.html
index 6d1be24c5d9267a72c5767f8b3c97da33b7f06d0..e20f5ab033d8c7411f8a0904d8f6b1578b3d809e 100644
--- a/mockup/personmock.html
+++ b/mockup/personmock.html
@@ -218,6 +218,8 @@
                         <p class="help-block"></p>
                     </div>
                 </div>
+                <!-- This must be outside the form-group. -->
+                <input name="gender" value="" type="hidden">
 
 
                 <div class="form-group">