diff --git a/wp-admin/user-new.php b/wp-admin/user-new.php
index 87a0ec803..c29dd740c 100644
--- a/wp-admin/user-new.php
+++ b/wp-admin/user-new.php
@@ -26,7 +26,7 @@ If you do not want to join this site please ignore
 this email. This invitation will expire in a few days.
 
 Please click the following link to activate your user account:
-%%s' ), get_bloginfo('name'), site_url(), esc_html( $_REQUEST[ 'role' ] ) );
+%%s' ), get_bloginfo('name'), home_url(), esc_html( $_REQUEST[ 'role' ] ) );
 	}
 	add_filter( 'wpmu_signup_user_notification_email', 'admin_created_user_email' );
 
diff --git a/wp-includes/ms-functions.php b/wp-includes/ms-functions.php
index 09acdedf2..2466de9fc 100644
--- a/wp-includes/ms-functions.php
+++ b/wp-includes/ms-functions.php
@@ -1734,9 +1734,9 @@ function maybe_add_existing_user_to_blog() {
 		delete_option( 'new_user_' . $key );
 
 	if ( empty( $details ) || is_wp_error( add_existing_user_to_blog( $details ) ) )
-		wp_die( sprintf(__('An error occurred adding you to this site. Back to the <a href="%s">homepage</a>.'), site_url() ) );
+		wp_die( sprintf(__('An error occurred adding you to this site. Back to the <a href="%s">homepage</a>.'), home_url() ) );
 
-	wp_die( sprintf(__('You have been added to this site. Please visit the <a href="%s">homepage</a> or <a href="%s">log in</a> using your username and password.'), site_url(), admin_url() ), __('Success') );
+	wp_die( sprintf(__('You have been added to this site. Please visit the <a href="%s">homepage</a> or <a href="%s">log in</a> using your username and password.'), home_url(), admin_url() ), __('Success') );
 }
 
 /**