diff --git a/Foundation/include/Poco/TaskNotification.h b/Foundation/include/Poco/TaskNotification.h
index f8f6841ab..beaddd7a0 100644
--- a/Foundation/include/Poco/TaskNotification.h
+++ b/Foundation/include/Poco/TaskNotification.h
@@ -102,7 +102,7 @@ private:
 
 class Foundation_API TaskProgressNotification: public TaskNotification
 	/// This notification is posted by the TaskManager for
-	/// every task that has failed with an exception.
+	/// a task when its progress changes.
 {
 public:
 	TaskProgressNotification(Task* pTask, float progress);
diff --git a/Foundation/src/Task.cpp b/Foundation/src/Task.cpp
index d5732f28b..afd896dcf 100644
--- a/Foundation/src/Task.cpp
+++ b/Foundation/src/Task.cpp
@@ -95,9 +95,12 @@ void Task::setProgress(float taskProgress)
 {
 	FastMutex::ScopedLock lock(_mutex);
 
-	_progress = taskProgress;
-	if (_pOwner)
-		_pOwner->taskProgress(this, _progress);
+	if (_progress != taskProgress)
+	{
+		_progress = taskProgress;
+		if (_pOwner)
+			_pOwner->taskProgress(this, _progress);
+	}
 }