diff --git a/src/corelib/tools/qelapsedtimer_win.cpp b/src/corelib/tools/qelapsedtimer_win.cpp
index b1faf22c3f..8171a27ea3 100644
--- a/src/corelib/tools/qelapsedtimer_win.cpp
+++ b/src/corelib/tools/qelapsedtimer_win.cpp
@@ -83,7 +83,9 @@ static inline qint64 ticksToNanoseconds(qint64 ticks)
 {
     if (counterFrequency > 0) {
         // QueryPerformanceCounter uses an arbitrary frequency
-        return ticks * 1000000000 / counterFrequency;
+        qint64 seconds = ticks / counterFrequency;
+        qint64 nanoSeconds = (ticks - seconds * counterFrequency) * 1000000000 / counterFrequency;
+        return seconds * 1000000000 + nanoSeconds;
     } else {
         // GetTickCount(64) return milliseconds
         return ticks * 1000000;