diff --git a/subform.module b/subform.module
index 084ac9f..95a3fb8 100644
--- a/subform.module
+++ b/subform.module
@@ -342,6 +342,10 @@ function subform_element_process($element, &$form_state) {
 
   $form_state['complete form']['#after_build']['subform_wrapper_after_build'] = 'subform_wrapper_after_build';
 
+  // Change the theme wrapper to be a container, so there will not be nested
+  // forms.
+  $subform['#theme_wrappers'] = 'container';
+
   $element['#subform'] = $subform;
   return $element;
 }