diff --git a/README.md b/README.md
index f361b88..6be4859 100644
--- a/README.md
+++ b/README.md
@@ -3,3 +3,9 @@ blueMSX-libretro
 
 source http://sourceforge.net/p/bluemsx/code/HEAD/tree/trunk/blueMSX/Make/blueMSXlite/
 svn://svn.code.sf.net/p/bluemsx/code/trunk
+
+this core requires the two folders named Machines/ and Databases/ from standalone blueMSX
+copied inside your frontend's system directory.
+
+you can get these from the official windows standalone version of bluemsx (http://www.bluemsx.com/)
+or any other binary package.