diff --git a/wp-includes/general-template.php b/wp-includes/general-template.php
index 2cba1da5cc..90bcdcec6a 100644
--- a/wp-includes/general-template.php
+++ b/wp-includes/general-template.php
@@ -974,6 +974,17 @@ function get_custom_logo( $blog_id = 0 ) {
 			$custom_logo_attr['alt'] = get_bloginfo( 'name', 'display' );
 		}
 
+		/**
+		 * Filters the list of custom logo image attributes.
+		 *
+		 * @since 5.5.0
+		 *
+		 * @param array $custom_logo_attr Custom logo image attributes.
+		 * @param int   $custom_logo_id   Custom logo attachment ID.
+		 * @param int   $blog_id          ID of the blog to get the custom logo for.
+		 */
+		$custom_logo_attr = apply_filters( 'get_custom_logo_image_attributes', $custom_logo_attr, $custom_logo_id, $blog_id );
+
 		/*
 		 * If the alt attribute is not empty, there's no need to explicitly pass it
 		 * because wp_get_attachment_image() already adds the alt attribute.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index ca50e66845..1231527290 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-alpha-48056';
+$wp_version = '5.5-alpha-48057';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.