diff --git a/README.md b/README.md
index 26abc8cdb4..f21bc8d86a 100644
--- a/README.md
+++ b/README.md
@@ -2,3 +2,18 @@ Caraboot
 ========
 
 U-Boot for Carambola2 based boards
+
+
+Build
+-------
+
+Use buildroot toolchain (http://buildroot.org/download.html) to build Caraboot. OpenWRT toolchain is known to generate broken binaries.
+To build suitable toolchain in buildroot's menuconfig select: MIPS big endian architecture (mips32 r2 variant), and GCC version - 4.7.x (other GCC versions untested, but may work)
+
+Change Makefile's CONFIG_TOOLCHAIN_PREFIX variable to your buildroot path, for example:
+```
+CONFIG_TOOLCHAIN_PREFIX=~/build/buildroot/output/host/usr/bin/mips-linux-
+```
+
+run ```make```, binary will be in ```bin/carambola2_u-boot.bin```
+