diff --git a/source/C/command_line.rst b/source/C/command_line.rst
index f38b80c8..af683733 100644
--- a/source/C/command_line.rst
+++ b/source/C/command_line.rst
@@ -58,4 +58,4 @@ If you want just to see the contents of a file on standard output run
 
    cat [filename]
 
-If you have a command and you don't want to type the whole thing out you can press the :kbd:`tab` key. 
+If you have a command and you don't want to type the whole thing out you can press the :kbd:`tab` key. If this does not work press :kbd:`tab` again and see the list of avaialable commands to run.