diff --git a/README.md b/README.md
index f0aca4b..8902994 100644
--- a/README.md
+++ b/README.md
@@ -62,6 +62,7 @@ Enjoy !
 
 # Common errors
 
+On **Ubuntu 20.04** :
 ```
 ------- sound initialization -------
 SDL audio driver initializing...
@@ -70,3 +71,8 @@ ALSA lib pcm.c:2642:(snd_pcm_open_noupdate) Unknown PCM default
 SDL_AudioDriverName() = NULL
 ------------------------------------
 ```
+
+You must install the corresponding 32 bits library :
+```bash
+sudo apt-get install libasound2-plugins:i386
+```