diff --git a/src/wp-admin/includes/class-walker-nav-menu-checklist.php b/src/wp-admin/includes/class-walker-nav-menu-checklist.php
index 3cc4401884..81c088420c 100644
--- a/src/wp-admin/includes/class-walker-nav-menu-checklist.php
+++ b/src/wp-admin/includes/class-walker-nav-menu-checklist.php
@@ -113,7 +113,7 @@ class Walker_Nav_Menu_Checklist extends Walker_Nav_Menu {
 		$output .= '<input type="hidden" class="menu-item-title" name="menu-item[' . $possible_object_id . '][menu-item-title]" value="' . esc_attr( $item->title ) . '" />';
 		$output .= '<input type="hidden" class="menu-item-url" name="menu-item[' . $possible_object_id . '][menu-item-url]" value="' . esc_attr( $item->url ) . '" />';
 		$output .= '<input type="hidden" class="menu-item-target" name="menu-item[' . $possible_object_id . '][menu-item-target]" value="' . esc_attr( $item->target ) . '" />';
-		$output .= '<input type="hidden" class="menu-item-attr_title" name="menu-item[' . $possible_object_id . '][menu-item-attr_title]" value="' . esc_attr( $item->attr_title ) . '" />';
+		$output .= '<input type="hidden" class="menu-item-attr-title" name="menu-item[' . $possible_object_id . '][menu-item-attr-title]" value="' . esc_attr( $item->attr_title ) . '" />';
 		$output .= '<input type="hidden" class="menu-item-classes" name="menu-item[' . $possible_object_id . '][menu-item-classes]" value="' . esc_attr( implode( ' ', $item->classes ) ) . '" />';
 		$output .= '<input type="hidden" class="menu-item-xfn" name="menu-item[' . $possible_object_id . '][menu-item-xfn]" value="' . esc_attr( $item->xfn ) . '" />';
 	}