diff --git a/core/um-actions-login.php b/core/um-actions-login.php
index 74494593..2b782c79 100644
--- a/core/um-actions-login.php
+++ b/core/um-actions-login.php
@@ -159,7 +159,8 @@
 
 		$rememberme = ( isset($args['rememberme']) ) ? 1 : 0;
 
-		if ( ( um_get_option('deny_admin_frontend_login')   && ! isset( $_GET['provider'] ) ) && ! strstr( um_user('wp_roles' ), 'administrator' ) > -1 ){
+
+		if ( ( um_get_option('deny_admin_frontend_login')   && ! isset( $_GET['provider'] ) ) && strrpos( um_user('wp_roles' ), 'administrator' ) >= 0 ){
 			wp_die( __('This action has been prevented for security measures.','ultimatemember') );
 		}