diff --git a/doc/airline.txt b/doc/airline.txt
index b542252..47641c8 100644
--- a/doc/airline.txt
+++ b/doc/airline.txt
@@ -904,6 +904,10 @@ Main features and default mappings of this extension are:
 >
   let g:xtabline_alt_action = "buffer #"
 
+Make sure to enable >
+  :let g:airline_extensions#tabline#show_buffers = 1
+otherwise the tabline might not actually be displayed correctly.
+
 -----------------------------------------------------------------------------
 
 You may also set these options: