diff --git a/payment/uc_google_checkout/uc_google_checkout.module b/payment/uc_google_checkout/uc_google_checkout.module
index d4d2582..b984a9d 100644
--- a/payment/uc_google_checkout/uc_google_checkout.module
+++ b/payment/uc_google_checkout/uc_google_checkout.module
@@ -467,7 +467,7 @@ function uc_google_checkout_cart_form($form, &$form_state) {
     break;
   }
 
-  $form['submit'] = array(
+  $form['uc_google_checkout'] = array(
     '#type' => 'image_button',
     '#button_type' => 'checkout',
     '#src' => $checkout_url . '/buttons/checkout.gif?merchant_id=' . $merchant_id . '&w=' . $width . '&h=' . $height . '&style=' . variable_get('uc_google_checkout_button_color', 'trans') . '&variant=' . ($disable ? 'disabled' : 'text') . '&loc=en_US',
diff --git a/payment/uc_paypal/uc_paypal.module b/payment/uc_paypal/uc_paypal.module
index 8a89766..3257cfb 100644
--- a/payment/uc_paypal/uc_paypal.module
+++ b/payment/uc_paypal/uc_paypal.module
@@ -672,7 +672,7 @@ function uc_paypal_ec_checkout($form, &$form_state) {
  * @see uc_paypal_ec_form_submit()
  */
 function uc_paypal_ec_form($form, &$form_state) {
-  $form['submit'] = array(
+  $form['uc_paypal'] = array(
     '#type' => 'image_button',
     '#button_type' => 'checkout',
     '#src' => 'https://www.paypal.com/en_US/i/btn/btn_xpressCheckoutsm.gif',