diff --git a/app/src/main/cpp/PhoneDevice.cpp b/app/src/main/cpp/PhoneDevice.cpp
index 58780085..7a3ea884 100644
--- a/app/src/main/cpp/PhoneDevice.cpp
+++ b/app/src/main/cpp/PhoneDevice.cpp
@@ -720,6 +720,8 @@ IDevice::timer_uid_t CPhoneDevice::RegisterTimer(unsigned int timerType, unsigne
     context->data = data;
     context->timerType = timerType;
     context->expectedTimes = times;
+    context->times = 0;
+    context->uid = 0;
 
     evp.sigev_value.sival_ptr = context;
     evp.sigev_notify = SIGEV_THREAD; //SIGEV_THREAD_ID;