diff --git a/libs/main/thread/pitimer.cpp b/libs/main/thread/pitimer.cpp
index f0de29f4..45aa73bc 100644
--- a/libs/main/thread/pitimer.cpp
+++ b/libs/main/thread/pitimer.cpp
@@ -19,7 +19,7 @@
 
 #include "pitimer.h"
 #include "piincludes_p.h"
-#include "piwaitevent_p.h"
+#include "piconditionvar.h"
 #ifdef PIP_TIMER_RT
 #  include <csignal>
 #endif
@@ -188,10 +188,11 @@ private:
 	virtual bool stopTimer(bool wait);
 	static void threadFuncS(void * d) {((_PITimerImp_Thread*)d)->threadFunc();}
 	void adjustTimes();
+	bool smallWait(int ms);
 
 	PIThread thread_;
 	PISystemTime st_time, st_inc, st_wait, st_odt;
-	PIWaitEvent event;
+	PIConditionVariable event;
 };
 
 
@@ -240,7 +241,6 @@ _PITimerImp_Thread::_PITimerImp_Thread() {
 	wait_dt = 1000;
 	wait_dd = 2000;
 	wait_tick = 1000;
-	event.create();
 	//piCout << "_PITimerImp_Thread" << this << ", thread& =" << &thread_;
 	//piCout << "new _PITimerImp_Thread";
 }
@@ -248,7 +248,6 @@ _PITimerImp_Thread::_PITimerImp_Thread() {
 
 _PITimerImp_Thread::~_PITimerImp_Thread() {
 	stop(true);
-	event.destroy();
 }
 
 
@@ -279,7 +278,9 @@ bool _PITimerImp_Thread::startTimer(double interval_ms) {
 
 bool _PITimerImp_Thread::stopTimer(bool wait) {
 	thread_.stop();
-	event.interrupt();
+	thread_.mutex().lock();
+	event.notifyAll();
+	thread_.mutex().unlock();
 	if (wait) return thread_.waitForFinish();
 //	if (wait)
 //		if (!thread_.waitForFinish(10))
@@ -301,12 +302,10 @@ bool _PITimerImp_Thread::threadFunc() {
 			dwt = st_time - PISystemTime::current(true);
 		if (wth > 0) {
 			if (dwt.toMilliseconds() > wth + 1.) {
-				event.sleep(wth * 1000);
-				if (thread_.isStopping()) return false;
+				smallWait(wth);
 				return false;
 			} else {
-				event.sleep(dwt.toMicroseconds());
-				if (thread_.isStopping()) return false;
+				if (!smallWait(dwt.toMilliseconds())) return false;
 				deferred_ = false;
 				st_time = PISystemTime::current(true);
 			}
@@ -325,13 +324,11 @@ bool _PITimerImp_Thread::threadFunc() {
 	}
 	if (wait_tick > 0) {
 		if (st_wait.toMilliseconds() > wait_tick + 1.) {
-			event.sleep(wait_tick * 1000);
-			if (thread_.isStopping()) return false;
+			smallWait(wait_tick);
 			return false;
 		} else {
 			//piCout << &thread_ << "sleep for" << st_wait;
-			event.sleep(st_wait.toMicroseconds());
-			if (thread_.isStopping()) return false;
+			if (!smallWait(st_wait.toMilliseconds())) return false;
 		}
 	} else {
 		if (st_wait.toMilliseconds() > 0.1)
@@ -372,6 +369,14 @@ void _PITimerImp_Thread::adjustTimes() {
 }
 
 
+bool _PITimerImp_Thread::smallWait(int ms) {
+	thread_.mutex().lock();
+	event.waitFor(thread_.mutex(), ms);
+	thread_.mutex().unlock();
+	return !thread_.isStopping();
+}
+
+
 
 
 #ifdef PIP_TIMER_RT
diff --git a/main.cpp b/main.cpp
index 56fda705..5ace916b 100644
--- a/main.cpp
+++ b/main.cpp
@@ -96,7 +96,7 @@ int main(int argc, char * argv[]) {
 	});
 	timer.start(500);
 
-	piSleep(2.12);
+	piSleep(1.12);
 	piCout << "end";
 	PITimeMeasurer tm;
 	timer.stop();