diff --git a/README b/README
index d1bf040..fdd44e5 100644
--- a/README
+++ b/README
@@ -24,6 +24,9 @@ setups:
 C/C++|General|Additional Include Directories: prefix ..\..\..\..\endian\include;$(BOOST_TRUNK);
 C/C++|Preprocessor: prefix BOOST_ALL_DYN_LINK; 
 Linker|General|Additional Library Directories: $(BOOST_TRUNK)\stage\lib
+
+IMPORTANT: If Preprocessor macros are supplied via a common property page,
+<inherit from parent or project defaults> must be set for each project!
 ------------------------------------------------------------------------------------------
 Copyright Beman Dawes, 2013
 Distributed under the Boost Software License, Version 1.0.