diff --git a/src/simulator/simulator.cc b/src/simulator/simulator.cc
index f3af0e24e..ad3f3d6d7 100644
--- a/src/simulator/simulator.cc
+++ b/src/simulator/simulator.cc
@@ -141,7 +141,7 @@ SimulatorPrivate::next (void) const
 {
 	assert (!m_events->is_empty ());
 	Scheduler::EventKey next_key = m_events->peek_next_key ();
-	return AbsTimeUs (next_key.m_ns);
+	return Time::abs_ns (next_key.m_ns);
 }
 
 
diff --git a/src/simulator/time.cc b/src/simulator/time.cc
index d1510e166..afa540d90 100644
--- a/src/simulator/time.cc
+++ b/src/simulator/time.cc
@@ -114,6 +114,33 @@ Time::destroy (void)
 	return Time ();
 }
 
+class AbsTimeS : public Time {
+public:
+	AbsTimeS (double s);
+};
+class AbsTimeUs : public Time {
+public:
+	AbsTimeUs (uint64_t us);
+};
+class RelTimeS : public Time {
+public:
+	RelTimeS (double s);
+};
+class RelTimeUs : public Time {
+public:
+	RelTimeUs (uint64_t us);
+};
+
+class NowTime : public Time {
+public:
+	NowTime ();
+};
+
+class DestroyTime : public Time {
+public:
+	DestroyTime ();
+};
+
 
 AbsTimeS::AbsTimeS (double s)
 	: Time ((uint64_t)(int64_t)(s * 1000000000.0))
diff --git a/src/simulator/time.h b/src/simulator/time.h
index 9ff374b7d..f7632cf23 100644
--- a/src/simulator/time.h
+++ b/src/simulator/time.h
@@ -49,32 +49,6 @@ private:
 	bool m_is_destroy;
 };
 
-class AbsTimeS : public Time {
-public:
-	AbsTimeS (double s);
-};
-class AbsTimeUs : public Time {
-public:
-	AbsTimeUs (uint64_t us);
-};
-class RelTimeS : public Time {
-public:
-	RelTimeS (double s);
-};
-class RelTimeUs : public Time {
-public:
-	RelTimeUs (uint64_t us);
-};
-
-class NowTime : public Time {
-public:
-	NowTime ();
-};
-
-class DestroyTime : public Time {
-public:
-	DestroyTime ();
-};
 
 }; // namespace ns3
 
diff --git a/utils/bench-simulator.cc b/utils/bench-simulator.cc
index c2c28081d..aa7085fdc 100644
--- a/utils/bench-simulator.cc
+++ b/utils/bench-simulator.cc
@@ -55,8 +55,8 @@ Bench::read_distribution (std::istream &input)
 	double data;
 	while (!input.eof ()) {
 		if (input >> data) {
-			uint64_t us = (uint64_t) (data * 1000000);
-			m_distribution.push_back (us);
+			uint64_t ns = (uint64_t) (data * 1000000000);
+			m_distribution.push_back (ns);
 		} else {
 			input.clear ();
 			std::string line;
@@ -73,7 +73,7 @@ Bench::bench (void)
 	time.start ();
 	for (std::vector<uint64_t>::const_iterator i = m_distribution.begin ();
 	     i != m_distribution.end (); i++) {
-		Simulator::schedule (AbsTimeUs (*i), &Bench::cb, this);
+		Simulator::schedule (Time::abs_ns (*i), &Bench::cb, this);
 	}
 	init = time.end ();
 
@@ -103,9 +103,9 @@ Bench::cb (void)
 		m_current = m_distribution.begin ();
 	}
 	if (g_debug) {
-		std::cerr << "event at " << Simulator::now ().s () << std::endl;
+		std::cerr << "event at " << Simulator::now ().s () << "s" << std::endl;
 	}
-	Simulator::schedule (AbsTimeUs (*m_current), &Bench::cb, this);
+	Simulator::schedule (Time::abs_ns (*m_current), &Bench::cb, this);
 	m_current++;
 	m_n++;
 }