diff --git a/src/wp-includes/media.php b/src/wp-includes/media.php
index f8a2da5134..d5114d4ab0 100644
--- a/src/wp-includes/media.php
+++ b/src/wp-includes/media.php
@@ -1136,20 +1136,20 @@ function wp_get_attachment_image_sizes( $attachment_id, $size = 'medium', $image
 }
 
 /**
- * Create 'sizes' attribute value for an image.
+ * Creates a 'sizes' attribute value for an image.
  *
  * @since 4.4.0
  *
  * @param array|string $size          Image size to retrieve. Accepts any valid image size, or an array
  *                                    of width and height values in pixels (in that order). Default 'medium'.
+ * @param string       $image_src     Optional. The URL to the image file. Default null.
  * @param array        $image_meta    Optional. The image meta data as returned by 'wp_get_attachment_metadata()'.
- * @param int          $attachment_id Optional. Image attachment ID. Either `$image_meta` or `$attachment_id` is needed
- *                                    when using the image size name as argument for `$size`.
- * @param string       $image_src     Optional. The URL to the image file.
- *
+ *                                    Default null.
+ * @param int          $attachment_id Optional. Image attachment ID. Either `$image_meta` or `$attachment_id`
+ *                                    is needed when using the image size name as argument for `$size`. Default 0.
  * @return string|bool A valid source size value for use in a 'sizes' attribute or false.
  */
-function wp_calculate_image_sizes( $size, $image_src, $image_meta, $attachment_id = 0 ) {
+function wp_calculate_image_sizes( $size, $image_src = null, $image_meta = null, $attachment_id = 0 ) {
 	$width = 0;
 
 	if ( is_array( $size ) ) {
@@ -1181,10 +1181,10 @@ function wp_calculate_image_sizes( $size, $image_src, $image_meta, $attachment_i
 	 *
 	 * @param string       $sizes         A source size value for use in a 'sizes' attribute.
 	 * @param array|string $size          Requested size. Image size or array of width and height values
-	 *                                    in pixels (in that order). Default 'medium'.
-	 * @param string       $image_src     The URL to the image file.
-	 * @param array        $image_meta    The image meta data as returned by 'wp_get_attachment_metadata()'.
-	 * @param int          $attachment_id Image attachment ID of the original image.
+	 *                                    in pixels (in that order).
+	 * @param string|null  $image_src     The URL to the image file or null.
+	 * @param array|null   $image_meta    The image meta data as returned by wp_get_attachment_metadata() or null.
+	 * @param int          $attachment_id Image attachment ID of the original image or 0.
 	 */
 	return apply_filters( 'wp_calculate_image_sizes', $sizes, $size, $image_src, $image_meta, $attachment_id );
 }