diff --git a/src/plugins/projectexplorer/task.cpp b/src/plugins/projectexplorer/task.cpp
index 7418462fcad..42db4a143e2 100644
--- a/src/plugins/projectexplorer/task.cpp
+++ b/src/plugins/projectexplorer/task.cpp
@@ -59,6 +59,17 @@ void Task::addMark(TextEditor::BaseTextMark *mark)
 bool Task::isNull() const
 { return taskId == 0; }
 
+void Task::clear()
+{
+    taskId = 0;
+    description.clear();
+    file = Utils::FileName();
+    line = -1;
+    movedLine = -1;
+    category = Core::Id();
+    type = Task::Unknown;
+}
+
 //
 // functions
 //
diff --git a/src/plugins/projectexplorer/task.h b/src/plugins/projectexplorer/task.h
index b566fba6ee3..a789f8951e6 100644
--- a/src/plugins/projectexplorer/task.h
+++ b/src/plugins/projectexplorer/task.h
@@ -57,6 +57,7 @@ public:
          const Utils::FileName &file_, int line_, const Core::Id &category_);
 
     bool isNull() const;
+    void clear();
 
     unsigned int taskId;
     TaskType type;