diff --git a/wp-admin/install.php b/wp-admin/install.php
index 88350ca5a9..7a0870705e 100644
--- a/wp-admin/install.php
+++ b/wp-admin/install.php
@@ -90,7 +90,7 @@ function display_header( $body_classes = '' ) {
 	?>
 </head>
 <body class="wp-core-ui<?php echo $body_classes ?>">
-<h1 id="logo"><a href="<?php echo esc_url( __( 'https://wordpress.org/' ) ); ?>"><?php _e( 'WordPress' ); ?></a></h1>
+<h1 id="logo"><a href="<?php echo esc_url( __( 'https://wordpress.org/' ) ); ?>" tabindex="-1"><?php _e( 'WordPress' ); ?></a></h1>
 
 <?php
 } // end display_header()
diff --git a/wp-admin/maint/repair.php b/wp-admin/maint/repair.php
index db40a7aae7..cdc6c0aa5f 100644
--- a/wp-admin/maint/repair.php
+++ b/wp-admin/maint/repair.php
@@ -22,7 +22,7 @@ header( 'Content-Type: text/html; charset=utf-8' );
 	?>
 </head>
 <body class="wp-core-ui">
-<h1 id="logo"><a href="<?php echo esc_url( __( 'https://wordpress.org/' ) ); ?>"><?php _e( 'WordPress' ); ?></a></h1>
+<h1 id="logo"><a href="<?php echo esc_url( __( 'https://wordpress.org/' ) ); ?>" tabindex="-1"><?php _e( 'WordPress' ); ?></a></h1>
 
 <?php
 
diff --git a/wp-admin/setup-config.php b/wp-admin/setup-config.php
index c3a6f63988..5ef0af729d 100644
--- a/wp-admin/setup-config.php
+++ b/wp-admin/setup-config.php
@@ -103,7 +103,7 @@ function setup_config_display_header() {
 
 </head>
 <body class="wp-core-ui<?php if ( is_rtl() ) echo ' rtl'; ?>">
-<h1 id="logo"><a href="<?php esc_attr_e( 'https://wordpress.org/' ); ?>"><?php _e( 'WordPress' ); ?></a></h1>
+<h1 id="logo"><a href="<?php esc_attr_e( 'https://wordpress.org/' ); ?>" tabindex="-1"><?php _e( 'WordPress' ); ?></a></h1>
 <?php
 } // end function setup_config_display_header();
 
diff --git a/wp-admin/upgrade.php b/wp-admin/upgrade.php
index 10c04131a5..57dedad94c 100644
--- a/wp-admin/upgrade.php
+++ b/wp-admin/upgrade.php
@@ -59,7 +59,7 @@ else
 	?>
 </head>
 <body class="wp-core-ui">
-<h1 id="logo"><a href="<?php echo esc_url( __( 'https://wordpress.org/' ) ); ?>"><?php _e( 'WordPress' ); ?></a></h1>
+<h1 id="logo"><a href="<?php echo esc_url( __( 'https://wordpress.org/' ) ); ?>" tabindex="-1"><?php _e( 'WordPress' ); ?></a></h1>
 
 <?php if ( get_option( 'db_version' ) == $wp_db_version || !is_blog_installed() ) : ?>
 
diff --git a/wp-login.php b/wp-login.php
index 3b5e42c82c..33ab94b141 100644
--- a/wp-login.php
+++ b/wp-login.php
@@ -146,7 +146,7 @@ function login_header( $title = 'Log In', $message = '', $wp_error = '' ) {
 	</head>
 	<body class="login <?php echo esc_attr( implode( ' ', $classes ) ); ?>">
 	<div id="login">
-		<h1><a href="<?php echo esc_url( $login_header_url ); ?>" title="<?php echo esc_attr( $login_header_title ); ?>"><?php bloginfo( 'name' ); ?></a></h1>
+		<h1><a href="<?php echo esc_url( $login_header_url ); ?>" title="<?php echo esc_attr( $login_header_title ); ?>" tabindex="-1"><?php bloginfo( 'name' ); ?></a></h1>
 	<?php
 
 	unset( $login_header_url, $login_header_title );
