diff --git a/src/wp-admin/user-new.php b/src/wp-admin/user-new.php
index ebcd2a7dca..641fd822fd 100644
--- a/src/wp-admin/user-new.php
+++ b/src/wp-admin/user-new.php
@@ -75,7 +75,7 @@ if ( isset($_REQUEST['action']) && 'adduser' == $_REQUEST['action'] ) {
 				$redirect = add_query_arg( array( 'update' => 'could_not_add' ), 'user-new.php' );
 			}
 		} else {
-			$newuser_key = substr( md5( $user_id ), 0, 5 );
+			$newuser_key = wp_generate_password( 20, false );
 			add_option( 'new_user_' . $newuser_key, array( 'user_id' => $user_id, 'email' => $user_details->user_email, 'role' => $_REQUEST[ 'role' ] ) );
 
 			$roles = get_editable_roles();