diff --git a/wp-admin/includes/ms.php b/wp-admin/includes/ms.php
index 939d0d08b7..142aaee5f0 100644
--- a/wp-admin/includes/ms.php
+++ b/wp-admin/includes/ms.php
@@ -1050,7 +1050,7 @@ jQuery(document).ready( function($) {
 		// Don't show a spinner for English and installed languages,
 		// as there is nothing to download.
 		if ( ! languageSelect.find( 'option:selected' ).data( 'installed' ) ) {
-			$( '#submit', this ).after( '<span class="spinner language-install-spinner" />' );
+			$( '#submit', this ).after( '<span class="spinner language-install-spinner is-active" />' );
 		}
 	});
 });
diff --git a/wp-admin/includes/options.php b/wp-admin/includes/options.php
index 14c175de23..a085a4ad5c 100644
--- a/wp-admin/includes/options.php
+++ b/wp-admin/includes/options.php
@@ -78,7 +78,7 @@ function options_general_add_js() {
 			// Don't show a spinner for English and installed languages,
 			// as there is nothing to download.
 			if ( ! languageSelect.find( 'option:selected' ).data( 'installed' ) ) {
-				$( '#submit', this ).after( '<span class="spinner language-install-spinner" />' );
+				$( '#submit', this ).after( '<span class="spinner language-install-spinner is-active" />' );
 			}
 		});
 	});
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 8db13c80a6..0957398dae 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-40578';
+$wp_version = '4.8-alpha-40579';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.