diff --git a/doc/RTD/source/ParameterFiles/index.rst b/doc/RTD/source/ParameterFiles/index.rst
index 6ff6d5f7625693b199f1aa966403bea633065ab4..ec938c6062056e1c1e081c10813ed61b8bfc936f 100644
--- a/doc/RTD/source/ParameterFiles/index.rst
+++ b/doc/RTD/source/ParameterFiles/index.rst
@@ -302,6 +302,7 @@ The full section to start a DM+hydro run from Gadget DM-only ICs would
 be:
 
 .. code:: YAML
+
    InitialConditions:
      file_name:  my_ics.hdf5
      periodic:                    1