diff --git a/src/core/pitime.h b/src/core/pitime.h
index 0484003d..270a24e5 100755
--- a/src/core/pitime.h
+++ b/src/core/pitime.h
@@ -60,7 +60,7 @@ public:
 	PISystemTime() {seconds = nanoseconds = 0;}
 	
 	//! Contructs system time with s = "s" and ns = "ns"
-	PISystemTime(long s, long ns) {seconds = s; nanoseconds = ns; checkOverflows();}
+	PISystemTime(int s, int ns) {seconds = s; nanoseconds = ns; checkOverflows();}
 	
 	//! Contructs system time from another
 	PISystemTime(const PISystemTime & t) {seconds = t.seconds; nanoseconds = t.nanoseconds;}
@@ -148,25 +148,25 @@ public:
 	
 	
 	//! Contructs system time from seconds "v"
-	static PISystemTime fromSeconds(double v) {long s = piFloord(v); return PISystemTime(s, (v - s) * 1000000000);}
+	static PISystemTime fromSeconds(double v) {int s = piFloord(v); return PISystemTime(s, (v - s) * 1000000000);}
 	
 	//! Contructs system time from milliseconds "v"
-	static PISystemTime fromMilliseconds(double v) {long s = piFloord(v / 1000.); return PISystemTime(s, (v / 1000. - s) * 1000000000);}
+	static PISystemTime fromMilliseconds(double v) {int s = piFloord(v / 1000.); return PISystemTime(s, (v / 1000. - s) * 1000000000);}
 	
 	//! Contructs system time from microseconds "v"
-	static PISystemTime fromMicroseconds(double v) {long s = piFloord(v / 1000000.); return PISystemTime(s, (v / 1000000. - s) * 1000000000);}
+	static PISystemTime fromMicroseconds(double v) {int s = piFloord(v / 1000000.); return PISystemTime(s, (v / 1000000. - s) * 1000000000);}
 	
 	//! Contructs system time from nanoseconds "v"
-	static PISystemTime fromNanoseconds(double v) {long s = piFloord(v / 1000000000.); return PISystemTime(s, (v / 1000000000. - s) * 1000000000);}
+	static PISystemTime fromNanoseconds(double v) {int s = piFloord(v / 1000000000.); return PISystemTime(s, (v / 1000000000. - s) * 1000000000);}
 	
 	//! Returns current system time
 	static PISystemTime current(bool precise_but_not_system = false);
 	
 	//! Seconds of stored system time
-	long seconds;
+	int seconds;
 	
 	//! Nanoseconds of stored system time
-	long nanoseconds;
+	int nanoseconds;
 	
 private:
 	void checkOverflows() {while (nanoseconds >= 1000000000) {nanoseconds -= 1000000000; seconds++;} while (nanoseconds < 0) {nanoseconds += 1000000000; seconds--;}}