diff --git a/lib/core.js b/lib/core.js
index 8c104c082..5e3f5af8c 100644
--- a/lib/core.js
+++ b/lib/core.js
@@ -1333,8 +1333,10 @@
             for(var i = 0; i < allData.length; i++) {
                 var r = allData[i];
                 for(var key in r.data) {
-                    if (r.data[key].abortController || BIG_CONTEXT.indexOf(key) > -1) {
-                        r.data[key] = 'BIG_CONTEXT';
+                    if (r.data[key]) {
+                        if (r.data[key].abortController || BIG_CONTEXT.indexOf(key) > -1) {
+                            r.data[key] = 'BIG_CONTEXT';
+                        }
                     }
                 }
             }