diff --git a/README.md b/README.md
index 05122fc..9f6826b 100644
--- a/README.md
+++ b/README.md
@@ -30,6 +30,6 @@ If you build a prototype by using the SMALL library, let me know :-) sekisushai@
 
 # SMA signal processing
 To encode the microphones signals onto Spherical Harmonics signals (i.e. Ambisonics signals), one can use ambitools.
-See www.sekisushai.net/ambitools/docs/mic_encoder.html for more infos.
+See http://www.sekisushai.net/ambitools/docs/mic_encoder.html for more infos.
 
 # SMA calibration with a robotic arm