2 files changed, 4 insertions, 1 deletions
diff --git a/src/corelib/animation/qabstractanimation.h b/src/corelib/animation/qabstractanimation.h
index 7f2577d7f7..212fbea161 100644
--- a/src/corelib/animation/qabstractanimation.h
+++ b/src/corelib/animation/qabstractanimation.h
@@ -49,6 +49,7 @@ QT_BEGIN_NAMESPACE
 class QAnimationGroup;
 class QSequentialAnimationGroup;
 class QAnimationDriver;
+class QUnifiedTimer;
 
 class QAbstractAnimationPrivate;
 class Q_CORE_EXPORT QAbstractAnimation : public QObject
diff --git a/src/corelib/animation/qvariantanimation.cpp b/src/corelib/animation/qvariantanimation.cpp
index 98b02f0202..eac1524107 100644
--- a/src/corelib/animation/qvariantanimation.cpp
+++ b/src/corelib/animation/qvariantanimation.cpp
@@ -276,7 +276,9 @@ void QVariantAnimationPrivate::setCurrentValueForProgress(const qreal progress)
 
     const qreal startProgress = currentInterval.start.first;
     const qreal endProgress = currentInterval.end.first;
-    const qreal localProgress = (progress - startProgress) / (endProgress - startProgress);
+    const qreal localProgress =
+            qIsNull(progress - startProgress) ? 0.0 // avoid 0/0 below
+            /* else */                        : (progress - startProgress) / (endProgress - startProgress);
 
     QVariant ret = q->interpolated(currentInterval.start.second,
                                    currentInterval.end.second,