diff --git a/doc/05-repositories.md b/doc/05-repositories.md
index c0f27791a..b8822d698 100644
--- a/doc/05-repositories.md
+++ b/doc/05-repositories.md
@@ -655,4 +655,10 @@ You can disable the default Packagist.org repository by adding this to your
 }
 ```
 
+You can disable Packagist.org globally by using the global config flag:
+
+```
+composer confg -g repo.packagist false
+```
+
 ← [Schema](04-schema.md)  |  [Config](06-config.md) →