diff --git a/doc/dynare.texi b/doc/dynare.texi
index 275eb8a24aa245b3e19e286287ad0df59b9d73a7..d9b68db537802959aa791e8f4d14a98a6bc2e93f 100644
--- a/doc/dynare.texi
+++ b/doc/dynare.texi
@@ -4432,7 +4432,7 @@ The number of the first observation to be used. Default: @code{1}
 @item prefilter = @var{INTEGER}
 @anchor{prefilter}
 A value of @code{1} means that the estimation procedure will demean
-the data. Default: @code{0}, @i{i.e.} no prefiltering
+each data series by its empirical mean. Default: @code{0}, @i{i.e.} no prefiltering
 
 @item presample = @var{INTEGER}
 @anchor{presample}