diff --git a/src/plugins/projectexplorer/task.cpp b/src/plugins/projectexplorer/task.cpp
index a16a7283446..bbec54f14f0 100644
--- a/src/plugins/projectexplorer/task.cpp
+++ b/src/plugins/projectexplorer/task.cpp
@@ -68,8 +68,8 @@ Task Task::compilerMissingTask()
 void Task::setMark(TextEditor::TextMark *mark)
 {
     QTC_ASSERT(mark, return);
-    QTC_ASSERT(m_mark.isNull(), return);
-    m_mark = QSharedPointer<TextEditor::TextMark>(mark);
+    QTC_ASSERT(!m_mark, return);
+    m_mark = std::shared_ptr<TextEditor::TextMark>(mark);
 }
 
 bool Task::isNull() const
@@ -90,7 +90,7 @@ void Task::clear()
     category = Utils::Id();
     m_icon = QIcon();
     formats.clear();
-    m_mark.clear();
+    m_mark.reset();
 }
 
 void Task::setFile(const Utils::FilePath &file_)
diff --git a/src/plugins/projectexplorer/task.h b/src/plugins/projectexplorer/task.h
index 830cea79397..563214d9d30 100644
--- a/src/plugins/projectexplorer/task.h
+++ b/src/plugins/projectexplorer/task.h
@@ -85,7 +85,7 @@ public:
 private:
     void setMark(TextEditor::TextMark *mark);
 
-    QSharedPointer<TextEditor::TextMark> m_mark;
+    std::shared_ptr<TextEditor::TextMark> m_mark;
     mutable QIcon m_icon;
     static unsigned int s_nextId;
 
diff --git a/src/plugins/projectexplorer/taskhub.cpp b/src/plugins/projectexplorer/taskhub.cpp
index 09b7d49e7b9..3056190d097 100644
--- a/src/plugins/projectexplorer/taskhub.cpp
+++ b/src/plugins/projectexplorer/taskhub.cpp
@@ -126,7 +126,7 @@ void TaskHub::addTask(Task task)
     QTC_ASSERT(s_registeredCategories.contains(task.category), return);
     QTC_ASSERT(!task.description().isEmpty(), return);
     QTC_ASSERT(!task.isNull(), return);
-    QTC_ASSERT(task.m_mark.isNull(), return);
+    QTC_ASSERT(!task.m_mark, return);
 
     if (task.file.isEmpty() || task.line <= 0)
         task.line = -1;