diff --git a/packages/core/src/NodeExecuteFunctions.ts b/packages/core/src/NodeExecuteFunctions.ts
index 3e621f706..0459d61a7 100644
--- a/packages/core/src/NodeExecuteFunctions.ts
+++ b/packages/core/src/NodeExecuteFunctions.ts
@@ -1326,7 +1326,7 @@ export function returnJsonArray(jsonData: IDataObject | IDataObject[]): INodeExe
 	}
 
 	jsonData.forEach((data: IDataObject & { json?: IDataObject }) => {
-		if (data.json) {
+		if (data?.json) {
 			// We already have the JSON key so avoid double wrapping
 			returnData.push({ ...data, json: data.json });
 		} else {