diff --git a/src/tapoCamera.ts b/src/tapoCamera.ts
index 4c41513..0fe8ea9 100644
--- a/src/tapoCamera.ts
+++ b/src/tapoCamera.ts
@@ -443,7 +443,7 @@ export class TAPOCamera extends OnvifCamera {
 
           if (isSecureConnection) {
             const encryptedResponse = json as TAPOCameraEncryptedResponse;
-            if (encryptedResponse.result.response) {
+            if (encryptedResponse.result?.response) {
               const decryptedResponse = this.decryptResponse(
                 encryptedResponse.result.response
               );
diff --git a/src/types/tapo.ts b/src/types/tapo.ts
index bb0c90d..6821161 100644
--- a/src/types/tapo.ts
+++ b/src/types/tapo.ts
@@ -81,7 +81,7 @@ export type TAPOCameraRequest =
   | TAPOCameraEncryptedRequest;
 
 export type TAPOCameraEncryptedResponse = {
-  result: {
+  result?: {
     response: string;
   };
 };