2 files changed, 7 insertions, 7 deletions
diff --git a/src/corelib/concurrent/qfutureinterface.cpp b/src/corelib/concurrent/qfutureinterface.cpp
index 6256944..627d0c7 100644
--- a/src/corelib/concurrent/qfutureinterface.cpp
+++ b/src/corelib/concurrent/qfutureinterface.cpp
@@ -421,9 +421,11 @@ bool QFutureInterfaceBase::referenceCountIsOne() const
 
 QFutureInterfaceBasePrivate::QFutureInterfaceBasePrivate(QFutureInterfaceBase::State initialState)
     : refCount(1), m_progressValue(0), m_progressMinimum(0), m_progressMaximum(0),
-      state(initialState), progressTimeStarted(false), pendingResults(0),
+      state(initialState), pendingResults(0),
       manualProgress(false), m_expectedResultCount(0), runnable(0)
-{ }
+{
+    progressTime.invalidate();
+}
 
 int QFutureInterfaceBasePrivate::internal_resultCount() const
 {
@@ -455,12 +457,11 @@ bool QFutureInterfaceBasePrivate::internal_updateProgress(int progress,
     m_progressValue = progress;
     m_progressText = progressText;
 
-    if (progressTimeStarted == true && m_progressValue != m_progressMaximum) // make sure the first and last steps are emitted.
+    if (progressTime.isValid() && m_progressValue != m_progressMaximum) // make sure the first and last steps are emitted.
         if (progressTime.elapsed() < (1000 / MaxProgressEmitsPerSecond))
             return false;
 
     progressTime.start();
-    progressTimeStarted = true;
     return true;
 }
 
diff --git a/src/corelib/concurrent/qfutureinterface_p.h b/src/corelib/concurrent/qfutureinterface_p.h
index 7f93c75..538947e 100644
--- a/src/corelib/concurrent/qfutureinterface_p.h
+++ b/src/corelib/concurrent/qfutureinterface_p.h
@@ -53,7 +53,7 @@
 // We mean it.
 //
 
-#include <QtCore/qdatetime.h>
+#include <QtCore/qelapsedtimer.h>
 #include <QtCore/qcoreevent.h>
 #include <QtCore/qlist.h>
 #include <QtCore/qwaitcondition.h>
@@ -137,8 +137,7 @@ public:
     int m_progressMinimum;
     int m_progressMaximum;
     QFutureInterfaceBase::State state;
-    QTime progressTime;
-    bool progressTimeStarted;
+    QElapsedTimer progressTime;
     QWaitCondition pausedWaitCondition;
     int pendingResults;
     QtConcurrent::ResultStoreBase m_results;