diff --git a/uc_cart/uc_cart.css b/uc_cart/uc_cart.css
index f2ef950..ba4e192 100644
--- a/uc_cart/uc_cart.css
+++ b/uc_cart/uc_cart.css
@@ -95,6 +95,14 @@
 /**
  * CSS rules for the cart form at /cart.
  */
+#cart-default-update {
+  height: 0px;
+  left: -9999px;
+  position: absolute;
+  visibility: hidden;
+  width: 0px;
+}
+
 #cart-form-products {
   border: solid 1px #bbb;
   margin-top: .5em;
diff --git a/uc_cart/uc_cart.module b/uc_cart/uc_cart.module
index f703a31..44dc964 100644
--- a/uc_cart/uc_cart.module
+++ b/uc_cart/uc_cart.module
@@ -997,7 +997,12 @@ function theme_uc_cart_view_form($variables) {
 
   drupal_add_css(drupal_get_path('module', 'uc_cart') . '/uc_cart.css');
 
-  $output = '<div id="cart-form-products">'
+  // Output a hidden copy of the update cart button first, so pressing Enter
+  // updates the cart instead of removing an item.
+  $output = '<div id="cart-default-update">' . drupal_render($form['actions']['update']) . '</div>';
+  $form['actions']['update']['#printed'] = FALSE;
+
+  $output .= '<div id="cart-form-products">'
           . drupal_render($form['items']) . '</div>';
 
   foreach (element_children($form['items']) as $i) {