diff --git a/include/wx/msw/wrl/EventToken.h b/include/wx/msw/wrl/EventToken.h
index 3b79b3a26d..8d178baa5a 100644
--- a/include/wx/msw/wrl/EventToken.h
+++ b/include/wx/msw/wrl/EventToken.h
@@ -7,6 +7,9 @@
 // Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
+// Note: this include guard uses the same name as winrt/EventToken.h in the
+// Windows SDK to prevent a struct type redefinition when both headers are
+// included.
 #ifndef __eventtoken_h__
 #define __eventtoken_h__
 
diff --git a/interface/wx/webview.h b/interface/wx/webview.h
index 18581d2c9a..1df97b3d1a 100644
--- a/interface/wx/webview.h
+++ b/interface/wx/webview.h
@@ -320,7 +320,7 @@ public:
     virtual filesystems, custom urls.
 
     This backend is not enabled by default, to build it follow these steps:
-    - Visual Studio 2015, or newer, is required
+    - Visual Studio 2015 or newer, or GCC/Clang with c++11 is required
     - With CMake just enable @c wxUSE_WEBVIEW_EDGE
     - When not using CMake:
         - Download the <a href="https://aka.ms/webviewnuget">WebView2 SDK</a>