diff --git a/packages/node_modules/@node-red/nodes/core/common/20-inject.js b/packages/node_modules/@node-red/nodes/core/common/20-inject.js
index 92b8122df..734bce765 100644
--- a/packages/node_modules/@node-red/nodes/core/common/20-inject.js
+++ b/packages/node_modules/@node-red/nodes/core/common/20-inject.js
@@ -109,9 +109,10 @@ module.exports = function(RED) {
                 if (!property) return;
 
                 if (valueType === "jsonata") {
-                    if (p.exp) {
+                    if (p.v) {
                         try {
-                            var val = RED.util.evaluateJSONataExpression(p.exp, msg);
+                            var exp = RED.util.prepareJSONataExpression(p.v, node);
+                            var val = RED.util.evaluateJSONataExpression(exp, msg);
                             RED.util.setMessageProperty(msg, property, val, true);
                         }
                         catch  (err) {