diff --git a/wp-admin/edit-tags.php b/wp-admin/edit-tags.php
index 5ab4cac567..c71212b95c 100644
--- a/wp-admin/edit-tags.php
+++ b/wp-admin/edit-tags.php
@@ -583,7 +583,7 @@ if ( current_user_can( $tax->cap->edit_terms ) ) {
 	<?php
 	printf(
 		/* translators: %s: default category */
-		__( 'Deleting a category does not delete the posts in that category. Instead, posts that were only assigned to the deleted category are set to the category %s.' ),
+		__( 'Deleting a category does not delete the posts in that category. Instead, posts that were only assigned to the deleted category are set to the default category %s. The default category cannot be deleted.' ),
 		/** This filter is documented in wp-includes/category-template.php */
 		'<strong>' . apply_filters( 'the_category', get_cat_name( get_option( 'default_category' ) ), '', '' ) . '</strong>'
 	);
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 3f78a52218..3a9aa7df00 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.0-alpha-43665';
+$wp_version = '5.0-alpha-43666';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.