1 files changed, 6 insertions, 4 deletions
diff --git a/src/gui/styles/qwindowsstyle.cpp b/src/gui/styles/qwindowsstyle.cpp
index 30f2f35..0a59d6d 100644
--- a/src/gui/styles/qwindowsstyle.cpp
+++ b/src/gui/styles/qwindowsstyle.cpp
@@ -213,10 +213,12 @@ bool QWindowsStyle::eventFilter(QObject *o, QEvent *e)
     case QEvent::StyleChange:
     case QEvent::Show:
         if (QProgressBar *bar = qobject_cast<QProgressBar *>(o)) {
-            d->bars << bar;
-            if (d->bars.size() == 1) {
-                Q_ASSERT(d->animationFps> 0);
-                d->animateTimer = startTimer(1000 / d->animationFps);
+            if (!d->bars.contains(bar)) {
+                d->bars << bar;
+                if (d->bars.size() == 1) {
+                    Q_ASSERT(d->animationFps> 0);
+                    d->animateTimer = startTimer(1000 / d->animationFps);
+                }
             }
         }
         break;