diff --git a/src/public/tier0/frametask.h b/src/public/tier0/frametask.h
index 9c4601a4..bdad2d8e 100644
--- a/src/public/tier0/frametask.h
+++ b/src/public/tier0/frametask.h
@@ -22,7 +22,7 @@ public:
     void Dispatch(std::function<void()> functor, unsigned int frames);
 
 private:
-    mutable std::mutex m_Mutex;
+    mutable CThreadMutex m_Mutex;
     std::list<QueuedTasks_s> m_QueuedTasks;
 };
 
diff --git a/src/tier0/frametask.cpp b/src/tier0/frametask.cpp
index a2f3903d..908459eb 100644
--- a/src/tier0/frametask.cpp
+++ b/src/tier0/frametask.cpp
@@ -12,7 +12,7 @@
 //-----------------------------------------------------------------------------
 void CFrameTask::RunFrame()
 {
-    std::lock_guard<std::mutex> l(m_Mutex);
+    AUTO_LOCK(m_Mutex);
 
     for (QueuedTasks_s& delay : m_QueuedTasks)
     {
@@ -49,7 +49,7 @@ bool CFrameTask::IsFinished() const
 //-----------------------------------------------------------------------------
 void CFrameTask::Dispatch(std::function<void()> functor, unsigned int frames)
 {
-    std::lock_guard<std::mutex> l(m_Mutex);
+    AUTO_LOCK(m_Mutex);
     m_QueuedTasks.emplace_back(frames, functor);
 }