From 2639e8ececefd977d75e0430da3b9665e0fc510b Mon Sep 17 00:00:00 2001
From: Matthieu Schaller <schaller@strw.leidenuniv.nl>
Date: Thu, 26 Sep 2019 20:02:19 +0200
Subject: [PATCH] Add a message of caution about the alternative neighbour
 number definition.

---
 doc/RTD/source/ParameterFiles/parameter_description.rst | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/doc/RTD/source/ParameterFiles/parameter_description.rst b/doc/RTD/source/ParameterFiles/parameter_description.rst
index ae6191c928..dcc829fe2a 100644
--- a/doc/RTD/source/ParameterFiles/parameter_description.rst
+++ b/doc/RTD/source/ParameterFiles/parameter_description.rst
@@ -332,6 +332,10 @@ h_i)`). Note that in the case where all the particles in the simulation
 have the same mass, the two definitions lead to the same number density
 value.
 
+**We dot not recommend using this alternative neighbour number definition
+in production runs.** It is mainly provided for backward compatibility with
+earlier simulations.
+
 The second one, the relative tolerance for the smoothing length, specifies
 the convergence criteria for the smoothing length when using the
 Newton-Raphson scheme. This works with the maximal number of iterations,
-- 
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