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 cde9b2141..6973ebf1b 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 +109,8 @@ module.exports = function(RED) {
                 }
                 const p = props.shift()
                 const property = p.p;
-                const value = p.v ? p.v : '';
-                const valueType = p.vt ? p.vt : 'str';
-
+                const value = p.v !== undefined ? p.v : '';
+                const valueType = p.vt !== undefined ? p.vt : 'str';
                 if (property) {
                     if (valueType === "jsonata") {
                         if (p.v) {
diff --git a/packages/node_modules/@node-red/runtime/lib/flows/util.js b/packages/node_modules/@node-red/runtime/lib/flows/util.js
index 7cee1ed45..2559fd1da 100644
--- a/packages/node_modules/@node-red/runtime/lib/flows/util.js
+++ b/packages/node_modules/@node-red/runtime/lib/flows/util.js
@@ -57,18 +57,20 @@ var EnvVarPropertyRE = /^\${(\S+)}$/;
 
 
 function mapEnvVarProperties(obj,prop,flow,config) {
-    var v = obj[prop];
+    const v = obj[prop];
     if (Buffer.isBuffer(v)) {
         return;
     } else if (Array.isArray(v)) {
-        for (var i=0;i<v.length;i++) {
+        for (let i=0;i<v.length;i++) {
             mapEnvVarProperties(v,i,flow,config);
         }
     } else if (typeof obj[prop] === 'string') {
         if (obj[prop][0] === "$" && (EnvVarPropertyRE_old.test(v) || EnvVarPropertyRE.test(v)) ) {
-            var envVar = v.substring(2,v.length-1);
-            var r = redUtil.getSetting(config, envVar, flow);
-            obj[prop] = r ? r : obj[prop];
+            const envVar = v.substring(2,v.length-1);
+            const r = redUtil.getSetting(config, envVar, flow);
+            if (r !== undefined && r !== '') {
+                obj[prop] = r
+            }
         }
     } else {
         for (var p in v) {