diff --git a/doc/06-config.md b/doc/06-config.md
index 6ffbea411..0f110a428 100644
--- a/doc/06-config.md
+++ b/doc/06-config.md
@@ -260,7 +260,7 @@ driver directly, Composer will still attempt to use GitHub's zip files.
 
 Defaults to `true`. Composer allows repositories to define a notification URL,
 so that they get notified whenever a package from that repository is installed.
-This option allows you to disable that behaviour.
+This option allows you to disable that behavior.
 
 ## discard-changes