diff --git a/CMakeLists.txt b/CMakeLists.txt
index d42367b0..c64ba959 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 project(pip)
 cmake_minimum_required(VERSION 2.6)
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g3")
+#set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g3")
 
 include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})
 include(CheckFunctionExists)
diff --git a/src/io/pibinarylog.cpp b/src/io/pibinarylog.cpp
index 238786d5..17fc5fc5 100644
--- a/src/io/pibinarylog.cpp
+++ b/src/io/pibinarylog.cpp
@@ -146,10 +146,12 @@ bool PIBinaryLog::threadedRead(uchar *readed, int size) {
 		int dtc;
 		if (is_started) {
 			if (delay > 0) {
-				cdelay = delay / play_speed;
+				cdelay = delay * play_speed;
 				dtc = int(cdelay) /100;
+				if (play_speed <= 0.) dtc = 1;
 				for (int j=0; j<dtc; j++) {
-					cdelay = delay / play_speed;
+					if (play_speed <= 0.) j--;
+					cdelay = delay * play_speed;
 					dtc = int(cdelay) /100;
 					PISystemTime::fromMilliseconds(100).sleep();
 				}
@@ -541,7 +543,8 @@ void PIBinaryLog::propertyChanged(const PIString &) {
 	default_id = property("defaultID").toInt();
 	rapid_start = property("rapidStart").toBool();
 	play_mode = (PlayMode)property("playMode").toInt();
-	play_speed = property("playSpeed").toDouble();
+	double ps = property("playSpeed").toDouble();
+	play_speed = ps > 0 ? 1. / ps : 0;
 	play_delay = property("playDelay").toSystemTime();
 	split_mode = (SplitMode)property("splitMode").toInt();
 	split_time = property("splitTime").toSystemTime();
diff --git a/src/io/pibinarylog.h b/src/io/pibinarylog.h
index 7178d2d9..243a8c61 100644
--- a/src/io/pibinarylog.h
+++ b/src/io/pibinarylog.h
@@ -103,7 +103,7 @@ public:
 	int defaultID() const {return default_id;}
 	
 	//! Returns current play speed
-	double playSpeed() const {return play_speed;}
+	double playSpeed() const {return play_speed > 0 ? 1. / play_speed : 0;}
 
 	//! Returns current play delay
 	PISystemTime playDelay() const {return play_delay;}