diff --git a/bypy/windows.conf b/bypy/windows.conf
index 76633174aa..ad0d6116e4 100644
--- a/bypy/windows.conf
+++ b/bypy/windows.conf
@@ -5,6 +5,8 @@
 # Copy opengl32sw.dll from
 # https://download.qt.io/development_releases/prebuilt/llvmpipe/windows/
 # to C:/mesa/32 and C:/mesa/64
+# Ensure the windwos sdk version at least 10.0.18362 or newer is installed, needed for
+# qt-webengine-14.1
 
 vm_name 'calibre-windows-build'
 root 'C:/r'