diff --git a/core/modules/responsive_image/responsive_image.module b/core/modules/responsive_image/responsive_image.module
index 9cb8c3e..ae887d8 100644
--- a/core/modules/responsive_image/responsive_image.module
+++ b/core/modules/responsive_image/responsive_image.module
@@ -76,6 +76,8 @@ function responsive_image_theme() {
       'variables' => array(
         'uri' => NULL,
         'attributes' => array(),
+        'width' => NULL,
+        'height' => NULL,
         'responsive_image_style_id' => array(),
       ),
     ),