diff --git a/include/adevs_simulator.h b/include/adevs_simulator.h
index aa2f442..ed6e53e 100644
--- a/include/adevs_simulator.h
+++ b/include/adevs_simulator.h
@@ -617,7 +617,7 @@ void Simulator<X,T>::exec_event(Atomic<X,T>* model, bool internal, T t)
 		model->delta_ext(t-model->tL,*(model->x));
 	}
 	// Notify any listeners
-	notify_state_listeners(model,t);
+	this->notify_state_listeners(model,t);
 	// Check for a model transition
 	if (model->model_transition() && model->getParent() != NULL)
 	{
diff --git a/test/alt_time_tests.cpp b/test/alt_time_tests.cpp
index 2409adb..0d0e553 100644
--- a/test/alt_time_tests.cpp
+++ b/test/alt_time_tests.cpp
@@ -80,10 +80,10 @@ Model<T>::Model():
 	a(new PingPong<T>(true)),
 	b(new PingPong<T>())
 {
-	add(a);
-	add(b);
-	couple(a,b);
-	couple(b,a);
+	this->add(a);
+	this->add(b);
+	this->couple(a,b);
+	this->couple(b,a);
 }
 // Non-standard type for time
 class TimeType