diff --git a/packages/core/src/consumed-thing.ts b/packages/core/src/consumed-thing.ts
index ab44e44e3..95e744acc 100644
--- a/packages/core/src/consumed-thing.ts
+++ b/packages/core/src/consumed-thing.ts
@@ -116,7 +116,7 @@ export default class ConsumedThing extends TD.Thing implements WoT.ConsumedThing
             
             if (this.security && this.securityDefinitions && Array.isArray(this.security) && this.security.length>0) {
                 console.log(`ConsumedThing '${this.title}' setting credentials for ${client}`);
-                let scs : Array<WoT.Security>;
+                let scs : Array<WoT.Security> = [];
                 for(let s of this.security) {
                     let ws = this.securityDefinitions[s + ""]; // String vs. string (fix wot-typescript-definitions?)
                     if(ws && ws.scheme !== "nosec") {