diff --git a/system_setup/install.sh b/system_setup/install.sh
index 25ce3b6..8d560c0 100755
--- a/system_setup/install.sh
+++ b/system_setup/install.sh
@@ -29,7 +29,7 @@ finish_install() {
 
     chown root:root  "$MOUNT_POINT" -R
     chmod ug=rwX,o=rX "$MOUNT_POINT" -R
-    chmod o+w "$MOUNT_POINT/config" "$MOUNT_POINT/config.d"
+    chmod o+w "$MOUNT_POINT/config" "$MOUNT_POINT/config.d" -R
 
     # Create an empty ks.cfg at the OEMDRV root so non-root can overwrite it
     # with configure.sh (the OEMDRV root itself is not world-writable).