diff --git a/core/modules/responsive_image/responsive_image.module b/core/modules/responsive_image/responsive_image.module
index df1caea..d58a580 100644
--- a/core/modules/responsive_image/responsive_image.module
+++ b/core/modules/responsive_image/responsive_image.module
@@ -140,7 +140,7 @@ function responsive_image_theme() {
  *   - attributes: Attributes for the picture element.
  *   - style_name: The name of the style to be used to alter the original image.
  */
-function template_preprocess_picture(&$variables) {
+function template_preprocess_responsive_image(&$variables) {
   // Make sure that width and height are proper values
   // If they exists we'll output them
   // @see http://www.w3.org/community/respimg/2012/06/18/florians-compromise/
@@ -167,7 +167,7 @@ function template_preprocess_picture(&$variables) {
 
   if (!empty($variables['breakpoints'])) {
     // Fallback image, output as source with media query.
-    $src_attributes = picture_get_image_dimensions($variables);
+    $src_attributes = responsive_image_get_image_dimensions($variables);
     $src_attributes['src'] = entity_load('image_style', $variables['style_name'])->buildUrl($variables['uri']);
     $variables['sources'][] = array(
       'attributes' => new Attribute($src_attributes),
@@ -212,7 +212,7 @@ function template_preprocess_picture(&$variables) {
             unset($variables['src']);
           }
         }
-        $src_attributes += picture_get_image_dimensions($new_sources[0]);
+        $src_attributes += responsive_image_get_image_dimensions($new_sources[0]);
         $variables['sources'][] = array(
           'attributes' => new Attribute($src_attributes),
         );