diff --git a/Makefile.win32 b/Makefile.win32
index b527fcf45..a7e22052d 100644
--- a/Makefile.win32
+++ b/Makefile.win32
@@ -1,3 +1,6 @@
+# Do not edit this file.
+# Edit build/Makefile.win32.common for customization
+
 top_srcdir = .
 include $(top_srcdir)/build/Makefile.win32.common
 include $(top_srcdir)/build/Makefile.win32.features-h
diff --git a/build/Makefile.win32.common b/build/Makefile.win32.common
index 711a56f5c..d00f554b6 100644
--- a/build/Makefile.win32.common
+++ b/build/Makefile.win32.common
@@ -1,5 +1,8 @@
 default: all
 
+#
+# Edit build/Makefile.win32.features to enable features to build
+#
 include $(top_srcdir)/build/Makefile.win32.features
 
 ifeq ($(top_builddir),)