diff --git a/README.md b/README.md
index 6d75190..7251692 100644
--- a/README.md
+++ b/README.md
@@ -2,3 +2,5 @@ arduinoFFT
 ==========
 
 Fast Fourier Transform for Arduino
+
+This is a fork from https://code.google.com/p/makefurt/ which has been abandoned since 2011.