diff --git a/README.md b/README.md
index f845592..b8d9be6 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ It's targetting x86 and inspirated by http://sos.enix.org/fr/PagePrincipale
 To generate iso image
 
  * `mtools xorriso (which is libisoburn on ArchLinux)`
- * gcc >= 6
+ * gcc for 32bits (e.g. gcc-multilib for ubuntu) >= 11
  * sfdisk (util-linux)
 
 # Run it