diff --git a/src/wp-admin/nav-menus.php b/src/wp-admin/nav-menus.php
index b5328c4b62bb4..1443d73d3f314 100644
--- a/src/wp-admin/nav-menus.php
+++ b/src/wp-admin/nav-menus.php
@@ -1200,7 +1200,8 @@ function wp_nav_menu_max_depth( $classes ) {
 										<legend class="menu-settings-group-name howto"><?php _e( 'Display location' ); ?></legend>
 										<?php
 										foreach ( $locations as $location => $description ) :
-											$checked = false;
+											$checked          = false;
+											$aria_describedby = '';
 
 											if ( isset( $menu_locations[ $location ] )
 												&& 0 !== $nav_menu_selected_id
@@ -1208,17 +1209,30 @@ function wp_nav_menu_max_depth( $classes ) {
 											) {
 													$checked = true;
 											}
+
+											if ( ! empty( $menu_locations[ $location ] )
+												&& $menu_locations[ $location ] !== $nav_menu_selected_id
+											) {
+													$aria_describedby = "theme-location-set-$location";
+											}
 											?>
 											<div class="menu-settings-input checkbox-input">
-												<input type="checkbox"<?php checked( $checked ); ?> name="menu-locations[<?php echo esc_attr( $location ); ?>]" id="locations-<?php echo esc_attr( $location ); ?>" value="<?php echo esc_attr( $nav_menu_selected_id ); ?>" />
+												<input type="checkbox"<?php checked( $checked ); ?>
+													name="menu-locations[<?php echo esc_attr( $location ); ?>]"
+													id="locations-<?php echo esc_attr( $location ); ?>"
+													value="<?php echo esc_attr( $nav_menu_selected_id ); ?>"
+													<?php if ( '' !== $aria_describedby ) : ?>
+														aria-describedby="<?php echo esc_attr( $aria_describedby ); ?>"
+													<?php endif; ?>
+												/>
 												<label for="locations-<?php echo esc_attr( $location ); ?>"><?php echo $description; ?></label>
-												<?php if ( ! empty( $menu_locations[ $location ] ) && $menu_locations[ $location ] !== $nav_menu_selected_id ) : ?>
-													<span class="theme-location-set">
+												<?php if ( '' !== $aria_describedby ) : ?>
+													<span class="theme-location-set" id="theme-location-set-<?php echo esc_attr( $location ); ?>">
 													<?php
 														printf(
 															/* translators: %s: Menu name. */
 															_x( '(Currently set to: %s)', 'menu location' ),
-															wp_get_nav_menu_object( $menu_locations[ $location ] )->name
+															is_nav_menu( $menu_locations[ $location ] ) ? wp_get_nav_menu_object( $menu_locations[ $location ] )->name : __( 'an invalid menu ID' )
 														);
 													?>
 													</span>