diff --git a/cordova-plugin-ms-adal/cordova-plugin-ms-adal-tests.ts b/cordova-plugin-ms-adal/cordova-plugin-ms-adal-tests.ts
index d45e12262..8bdb7f142 100644
--- a/cordova-plugin-ms-adal/cordova-plugin-ms-adal-tests.ts
+++ b/cordova-plugin-ms-adal/cordova-plugin-ms-adal-tests.ts
@@ -15,7 +15,7 @@ function test_cordova_plugin_ms_adal() {
 
             context.tokenCache.readItems().then((cacheItems) => {
                 if (cacheItems.length >= 1) {
-                    var testUserId;
+                    var testUserId: string;
                     testUserId = cacheItems[0].userInfo.userId;
 
                     context.acquireTokenSilentAsync(testConfiguration.resourceUrl, testConfiguration.clientId, testUserId).then((authResult) => {
diff --git a/cordova-plugin-ms-adal/cordova-plugin-ms-adal.d.ts b/cordova-plugin-ms-adal/cordova-plugin-ms-adal.d.ts
index 2e4685243..68e88abcd 100644
--- a/cordova-plugin-ms-adal/cordova-plugin-ms-adal.d.ts
+++ b/cordova-plugin-ms-adal/cordova-plugin-ms-adal.d.ts
@@ -35,11 +35,11 @@ declare namespace Microsoft {
         }
 
         interface IPromise {
-            then(doneCallBack: () => void, failCallBack?: (message: string) => void);
+            then(doneCallBack: () => any, failCallBack?: (message: string) => any):any;
         }
 
         interface IPromiseTokenCacheItems {
-            then(doneCallBack: (tokenCacheItems: ITokenCacheItem[]) => void, failCallBack?: (message: string) => void);
+            then(doneCallBack: (tokenCacheItems: ITokenCacheItem[]) => any, failCallBack?: (message: string) => any):any;
         }
 
         class TokenCache implements ITokenCache {
@@ -101,7 +101,7 @@ declare namespace Microsoft {
         }
 
         interface IPromiseAuthenticationResult {
-            then(doneCallBack: (context: IAuthenticationResult) => void, failCallBack?: (message: string) => void);
+            then(doneCallBack: (context: IAuthenticationResult) => any, failCallBack?: (message: string) => any):any;
         }
 
         interface IAuthenticationContext {
@@ -142,7 +142,7 @@ declare namespace Microsoft {
         }
 
         interface IPromiseAuthenticationContext {
-            then(doneCallBack: (context: IAuthenticationContext) => void, failCallBack?: (message: string) => void);
+            then(doneCallBack: (context: IAuthenticationContext) => any, failCallBack?: (message: string) => any):any;
         }
 
         class AuthenticationContext implements IAuthenticationContext {