diff --git a/include/sta/rtos/timer.hpp b/include/sta/rtos/timer.hpp
index b576078..2fe4bc0 100644
--- a/include/sta/rtos/timer.hpp
+++ b/include/sta/rtos/timer.hpp
@@ -19,6 +19,7 @@ namespace sta
 	class RtosTimer : public Timer
 	{
 	public:
+		RtosTimer();
 		RtosTimer(void (*callback)(void *arg), void *arg);
         ~RtosTimer();
 
@@ -31,4 +32,4 @@ namespace sta
 	};
 } // namespace sta
 
-#endif // STA_RTOS_TIMER_HPP
\ No newline at end of file
+#endif // STA_RTOS_TIMER_HPP
diff --git a/src/timer.cpp b/src/timer.cpp
index 398cdd3..6302ecd 100644
--- a/src/timer.cpp
+++ b/src/timer.cpp
@@ -2,12 +2,15 @@
 #include <sta/debug/debug.hpp>
 
 namespace sta {
+	RtosTimer::RtosTimer(){}
+
     RtosTimer::RtosTimer(void (*callback)(void *arg), void *arg) {
         timer_attr_.name = "Timer";
         timer_attr_.attr_bits = osTimerOnce;
         timer_attr_.cb_size = sizeof(osTimerAttr_t);
 
         timer_id_ = osTimerNew(callback, osTimerOnce, arg, &timer_attr_);
+        STA_ASSERT_MSG(timer_id != 0, "Failed to initialize timer");
     }
 
     RtosTimer::~RtosTimer() {
@@ -25,4 +28,4 @@ namespace sta {
         
         if (status != osOK) STA_DEBUG_PRINTLN("Timer stop failed");
     }
-} // namespace sta
\ No newline at end of file
+} // namespace sta