diff --git a/packages/yasr/src/parsers/json.ts b/packages/yasr/src/parsers/json.ts
index 36089866..e2e88213 100644
--- a/packages/yasr/src/parsers/json.ts
+++ b/packages/yasr/src/parsers/json.ts
@@ -2,7 +2,7 @@ import Parser from "./";
 export default function (queryResponse: any, postProcessBinding: Parser.PostProcessBinding): Parser.SparqlResults {
   if (typeof queryResponse == "string") {
     const json = JSON.parse(queryResponse);
-    if (postProcessBinding) {
+    if (postProcessBinding && json.results) {
       for (const binding in json.results.bindings) {
         json.results.bindings[binding] = postProcessBinding(json.results.bindings[binding]);
       }