diff --git a/packages/node_modules/@node-red/runtime/lib/flows/Subflow.js b/packages/node_modules/@node-red/runtime/lib/flows/Subflow.js
index 824b88a28..4bbf3acad 100644
--- a/packages/node_modules/@node-red/runtime/lib/flows/Subflow.js
+++ b/packages/node_modules/@node-red/runtime/lib/flows/Subflow.js
@@ -119,7 +119,7 @@ class Subflow extends Flow {
         this.templateCredentials = credentials.get(subflowDef.id) || {};
         this.instanceCredentials = credentials.get(id) || {};
 
-        var env = [];
+        var env = {}; 
         if (this.subflowDef.env) {
             this.subflowDef.env.forEach(e => {
                 env[e.name] = e;