diff --git a/windows/uipriv_windows.hpp b/windows/uipriv_windows.hpp
index f5adacdd..3f199cbc 100644
--- a/windows/uipriv_windows.hpp
+++ b/windows/uipriv_windows.hpp
@@ -7,6 +7,7 @@
 #include "compilerver.hpp"
 
 // ui internal window messages
+// TODO make these either not messages or WM_USER-based, so we can be sane about reserving WM_APP
 enum {
 	// redirected WM_COMMAND and WM_NOTIFY
 	msgCOMMAND = WM_APP + 0x40,		// start offset just to be safe