diff --git a/reactos/base/shell/explorer/precomp.h b/reactos/base/shell/explorer/precomp.h
index 877e80b0a1d..15171ec0fc7 100644
--- a/reactos/base/shell/explorer/precomp.h
+++ b/reactos/base/shell/explorer/precomp.h
@@ -157,7 +157,6 @@ void WINAPI _ShellDDEInit(BOOL bInit);
  */
 
 #define TWM_OPENSTARTMENU (WM_USER + 260)
-#define TWM_DOEXITWINDOWS (WM_USER + 342)
 
 extern const GUID IID_IShellDesktopTray;
 
diff --git a/reactos/dll/win32/shell32/CDesktopBrowser.cpp b/reactos/dll/win32/shell32/CDesktopBrowser.cpp
index 2a2cd93576f..98fdbdcdf47 100644
--- a/reactos/dll/win32/shell32/CDesktopBrowser.cpp
+++ b/reactos/dll/win32/shell32/CDesktopBrowser.cpp
@@ -388,9 +388,6 @@ BOOL CDesktopBrowser::MessageLoop()
     return TRUE;
 }
 
-#define TWM_DOEXITWINDOWS (WM_USER + 342)
-#define TWM_CYCLEFOCUS (WM_USER + 348)
-
 LRESULT CDesktopBrowser::_NotifyTray(UINT uMsg, WPARAM wParam, LPARAM lParam)
 {
     HWND hwndTray;
diff --git a/reactos/include/reactos/undocshell.h b/reactos/include/reactos/undocshell.h
index 850d5af7c17..a70b075f321 100644
--- a/reactos/include/reactos/undocshell.h
+++ b/reactos/include/reactos/undocshell.h
@@ -23,6 +23,14 @@
 extern "C" {
 #endif /* defined(__cplusplus) */
 
+/****************************************************************************
+ * Taskbar WM_COMMAND identifiers
+ */
+
+#define TWM_DOEXITWINDOWS (WM_USER + 342)
+#define TWM_CYCLEFOCUS (WM_USER + 348)
+
+
 /****************************************************************************
  *	IDList Functions
  */