From 7099ce5d805ed13384c62c236839c66a42213ef3 Mon Sep 17 00:00:00 2001
From: Dave Longley <dlongley@digitalbazaar.com>
Date: Sat, 14 Sep 2013 21:29:23 -0400
Subject: [PATCH] Fix typo.

---
 jsonld.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/jsonld.php b/jsonld.php
index 072524f..386586c 100644
--- a/jsonld.php
+++ b/jsonld.php
@@ -2207,7 +2207,7 @@ class JsonLdProcessor {
 
       // syntax error if @id is not a string
       if($expanded_property === '@id' && !is_string($value)) {
-        if(!isset($options['isFrame']) && !$options['isFrame']) {
+        if(!isset($options['isFrame']) || !$options['isFrame']) {
           throw new JsonLdException(
             'Invalid JSON-LD syntax; "@id" value must a string.',
             'jsonld.SyntaxError', 'invalid @id value',