diff --git a/README.rst b/README.rst
index 4dd068f..9c4e962 100644
--- a/README.rst
+++ b/README.rst
@@ -157,7 +157,7 @@ GO
 Usage
 -----
 
-.. code-block:: shell
+.. code-block::
 
     usage: mpi4all [-h] [--out path] [--log lvl] [--cc path] [--cxx path]
                    [--exclude str [str ...]] [--enable-fortran] [--no-arg-names]