diff --git a/wp-includes/customize/class-wp-customize-image-control.php b/wp-includes/customize/class-wp-customize-image-control.php
index ef5bf271ff..03575d0800 100644
--- a/wp-includes/customize/class-wp-customize-image-control.php
+++ b/wp-includes/customize/class-wp-customize-image-control.php
@@ -15,7 +15,20 @@
  * @see WP_Customize_Upload_Control
  */
 class WP_Customize_Image_Control extends WP_Customize_Upload_Control {
-	public $type      = 'image';
+	/**
+	 * Control type.
+	 *
+	 * @since 3.4.0
+	 * @var string
+	 */
+	public $type = 'image';
+
+	/**
+	 * Media control mime type.
+	 *
+	 * @since 4.1.0
+	 * @var string
+	 */
 	public $mime_type = 'image';
 
 	/**
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 2e9b5b49d1..3fcdfb6f1f 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.7-alpha-49679';
+$wp_version = '5.7-alpha-49680';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.