diff --git a/doc/install/installation.md b/doc/install/installation.md
index f56d1c7..4ca5f2d 100644
--- a/doc/install/installation.md
+++ b/doc/install/installation.md
@@ -147,7 +147,7 @@ Fix the directory permissions for the repositories:
     # Make sure the repositories dir is owned by git and it stays that way
     sudo chmod -R ug+rwX,o-rwx /home/git/repositories/
     sudo chown -R git:git /home/git/repositories/
-    find /home/git/repositories -type d -print0 | sudo xargs -0 chmod g+s
+    sudo -u git -H find /home/git/repositories -type d -print0 | sudo xargs -0 chmod g+s
 
 
 ## Add domains to list to the list of known hosts
--
libgit2 0.21.2