diff --git a/mollom.module b/mollom.module
index 21e0bfd..298d900 100644
--- a/mollom.module
+++ b/mollom.module
@@ -2082,7 +2082,7 @@ function mollom_process_mollom($element, &$form_state, $complete_form) {
     // robots cannot simply check for a style attribute, but instead have to
     // implement advanced DOM processing to figure out whether they are dealing
     // with a honeypot field.
-    '#prefix' => '<div style="display: none;">',
+    '#prefix' => '<div style="element-hidden">',
     '#suffix' => '</div>',
     '#attributes' => array(
       // Disable browser autocompletion.