diff --git a/src/lte/doc/source/lte-fading-design.rst b/src/lte/doc/source/lte-fading-design.rst
index 04a0a95f0..2d007d374 100644
--- a/src/lte/doc/source/lte-fading-design.rst
+++ b/src/lte/doc/source/lte-fading-design.rst
@@ -86,4 +86,14 @@ The list of the parameters to be configured are:
 
 It is important to highlight that the sampling interval of the fading trace has to me at most of 1 ms or greater and in the latter case it has to be an integer multiple of 1 ms in order to be correctly processed by the fading module. 
 
+In order to activate the fading module (by default disactivated) it has to be explicity specified in the simulation script::
+
+  Ptr<LenaHelper> lena = CreateObject<LenaHelper> ();
+  lena->SetFadingModel("ns3::TraceFadingLossModel");
+
+While, for setting the parameters::
+
+  lena->SetFadingModelAttribute("Param", value);
+
+