diff --git a/lib/PowerShell/Utilities/ScriptBuilder.js b/lib/PowerShell/Utilities/ScriptBuilder.js
index 68bc01f1..68fd9c1e 100644
--- a/lib/PowerShell/Utilities/ScriptBuilder.js
+++ b/lib/PowerShell/Utilities/ScriptBuilder.js
@@ -1,6 +1,9 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 class ScriptBuilder {
+    constructor() {
+        this.script = "";
+    }
     getScript(scheme, tenantId, servicePrincipalId, servicePrincipalKey, subscriptionId, environment, scopeLevel) {
         this.script += `Clear-AzContext -Scope Process; Clear-AzContext -Scope CurrentUser -Force -ErrorAction SilentlyContinue;`;
         if (scheme === "ServicePrincipal") {
diff --git a/src/PowerShell/Utilities/ScriptBuilder.ts b/src/PowerShell/Utilities/ScriptBuilder.ts
index eaba02ea..8895d227 100644
--- a/src/PowerShell/Utilities/ScriptBuilder.ts
+++ b/src/PowerShell/Utilities/ScriptBuilder.ts
@@ -1,5 +1,5 @@
 export default class ScriptBuilder {
-    script: string;
+    script: string = "";
     getScript(scheme: string, tenantId: string, servicePrincipalId: string, servicePrincipalKey: string, subscriptionId: string, environment: string, scopeLevel: string): string {
         this.script += `Clear-AzContext -Scope Process; Clear-AzContext -Scope CurrentUser -Force -ErrorAction SilentlyContinue;`;
         if (scheme === "ServicePrincipal") {