diff --git a/README b/README
index d8fce30ee..e7e0744f8 100644
--- a/README
+++ b/README
@@ -3,7 +3,8 @@
 
 To build liblinphone for Android, you must:
 1) download the Android ndk (r5b, r6) from google.
-2) run the ./prepare_sources.sh script in the top level directory. This will download iLBC source files and convert some assembly files in VP8 project.
+2) install the autotools: autoconf, automake, aclocal, libtoolize
+3) run the ./prepare_sources.sh script in the top level directory. This will download iLBC source files and convert some assembly files in VP8 project.
 
 	$ ./prepare_sources.sh