diff --git a/includes/image.inc b/includes/image.inc
index b04943b..1e3be2b 100644
--- a/includes/image.inc
+++ b/includes/image.inc
@@ -166,8 +166,13 @@ function image_get_info($filepath, $toolkit = FALSE) {
  * @see image_resize()
  * @see image_crop()
  */
-function image_scale_and_crop(stdClass $image, $width, $height) {
+function image_scale_and_crop(stdClass $image, $width, $height, $upscale = TRUE) {
   $scale = max($width / $image->info['width'], $height / $image->info['height']);
+  if (!$upscale && $scale >= 1.0) {
+    $width = $width / $scale;
+    $height = $height / $scale;
+    $scale = 1.0;
+  }
   $x = ($image->info['width'] * $scale - $width) / 2;
   $y = ($image->info['height'] * $scale - $height) / 2;
 
diff --git a/modules/image/image.admin.inc b/modules/image/image.admin.inc
index d72fdf4..01b32ad 100644
--- a/modules/image/image.admin.inc
+++ b/modules/image/image.admin.inc
@@ -497,7 +497,7 @@ function image_effect_scale_validate($element, &$form_state) {
 /**
  * Form structure for the image resize form.
  *
- * Note that this is not a complete form, it only contains the portion of the
+ * Note that this is not a complete form; it only contains the portion of the
  * form for configuring the resize options. Therefore it does not not need to
  * include metadata about the effect, nor a submit button.
  *
@@ -531,8 +531,8 @@ function image_resize_form($data) {
 /**
  * Form structure for the image scale form.
  *
- * Note that this is not a complete form, it only contains the portion of the
- * form for configuring the scale options. Therefore it does not not need to
+ * Note that this is not a complete form; it only contains the portion of the
+ * form for configuring the scale options. Therefore it does not need to
  * include metadata about the effect, nor a submit button.
  *
  * @param $data
@@ -553,6 +553,27 @@ function image_scale_form($data) {
 }
 
 /**
+ * Form structure for the image scale and crop form.
+ *
+ * Note that this is not a complete form, it only contains the portion of the
+ * form for configuring the scale and crop options. Therefore it does not
+ * need to include metadata about the effect, nor a submit button.
+ *
+ * @param $data
+ *   The current configuration for this scale and crop effect.
+ */
+function image_scale_and_crop_form($data) {
+  $form = image_resize_form($data);
+  $form['upscale'] = array(
+    '#type' => 'checkbox',
+    '#default_value' => (isset($data['upscale'])) ? $data['upscale'] : TRUE,
+    '#title' => t('Allow upscaling'),
+    '#description' => t('Let scale make images larger than their original size'),
+  );
+  return $form;
+}
+
+/**
  * Form structure for the image crop form.
  *
  * Note that this is not a complete form, it only contains the portion of the
@@ -880,6 +901,23 @@ function theme_image_scale_summary($variables) {
 }
 
 /**
+ * Returns HTML for a summary of an image scale and crop effect.
+ *
+ * @param $variables
+ *   An associative array containing:
+ *   - data: The current configuration for this scale and crop effect.
+ *
+ * @ingroup themeable
+ */
+function theme_image_scale_and_crop_summary($variables) {
+  $data = $variables['data'];
+  if (!isset($data['upscale'])) {
+    $data['upscale'] = TRUE;
+  }
+  return theme('image_resize_summary', array('data' => $data)) . ' ' . ($data['upscale'] ? '(' . t('upscaling allowed') . ')' : '');
+}
+
+/**
  * Returns HTML for a summary of an image crop effect.
  *
  * @param $variables
diff --git a/modules/image/image.effects.inc b/modules/image/image.effects.inc
index 122af6c..6b3748b 100644
--- a/modules/image/image.effects.inc
+++ b/modules/image/image.effects.inc
@@ -28,8 +28,8 @@ function image_image_effect_info() {
       'label' => t('Scale and crop'),
       'help' => t('Scale and crop will maintain the aspect-ratio of the original image, then crop the larger dimension. This is most useful for creating perfectly square thumbnails without stretching the image.'),
       'effect callback' => 'image_scale_and_crop_effect',
-      'form callback' => 'image_resize_form',
-      'summary theme' => 'image_resize_summary',
+      'form callback' => 'image_scale_and_crop_form',
+      'summary theme' => 'image_scale_and_crop_summary',
     ),
     'image_crop' => array(
       'label' => t('Crop'),
@@ -163,7 +163,10 @@ function image_crop_effect(&$image, $data) {
  * @see image_scale_and_crop()
  */
 function image_scale_and_crop_effect(&$image, $data) {
-  if (!image_scale_and_crop($image, $data['width'], $data['height'])) {
+  if (!isset($data['upscale'])) {
+    $data['upscale'] = TRUE;
+  }
+  if (!image_scale_and_crop($image, $data['width'], $data['height'], $data['upscale'])) {
     watchdog('image', 'Image scale and crop failed using the %toolkit toolkit on %path (%mimetype, %dimensions)', array('%toolkit' => $image->toolkit, '%path' => $image->source, '%mimetype' => $image->info['mime_type'], '%dimensions' => $image->info['width'] . 'x' . $image->info['height']), WATCHDOG_ERROR);
     return FALSE;
   }
diff --git a/modules/image/image.module b/modules/image/image.module
index d2d081c..65b0912 100644
--- a/modules/image/image.module
+++ b/modules/image/image.module
@@ -210,6 +210,9 @@ function image_theme() {
     'image_scale_summary' => array(
       'variables' => array('data' => NULL),
     ),
+    'image_scale_and_crop_summary' => array(
+      'variables' => array('data' => NULL),
+    ),
     'image_crop_summary' => array(
       'variables' => array('data' => NULL),
     ),