diff --git a/base/shell/explorer/trayntfy.cpp b/base/shell/explorer/trayntfy.cpp
index 4df1a6240cd..d7e3b527547 100644
--- a/base/shell/explorer/trayntfy.cpp
+++ b/base/shell/explorer/trayntfy.cpp
@@ -80,6 +80,8 @@ public:
     virtual ~CIconWatcher()
     {
         Uninitialize();
+        DeleteCriticalSection(&m_ListLock);
+
         if (m_WakeUpEvent)
             CloseHandle(m_WakeUpEvent);
         if (m_hWatcherThread)