diff --git a/DESCRIPTION b/DESCRIPTION
index 9039ef9e41f3afe9a0d551055120e5e80016f1f9..f2f73b4309ad99caa580e16f2b3a99dba7dd7d4f 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: airGR
 Type: Package
 Title: Suite of GR Hydrological Models for Precipitation-Runoff Modelling
-Version: 1.6.9.11
+Version: 1.6.9.12
 Date: 2021-01-11
 Authors@R: c(
   person("Laurent", "Coron", role = c("aut", "trl"), comment = c(ORCID = "0000-0002-1503-6204")),
diff --git a/NEWS.md b/NEWS.md
index c8d791ea18f04c9d41d820524eaf7758f03089d0..1f8b389a187873a7066dc4392ca5c28201a0fbf9 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -2,7 +2,7 @@
 
 
 
-### 1.6.9.11 Release Notes (2021-01-11)
+### 1.6.9.12 Release Notes (2021-01-11)
 
 #### New features
 
diff --git a/man/PE_Oudin.Rd b/man/PE_Oudin.Rd
index 32e6d0eaf5ac01a80b385b7435936358de41cbf6..7aa96357b1620653cb6b1b51da691a4cb7cc9530 100644
--- a/man/PE_Oudin.Rd
+++ b/man/PE_Oudin.Rd
@@ -48,6 +48,8 @@ Function which computes PE using the formula from Oudin et al. (2005). PE can be
 }
 
 \details{
+To calculate basin-wide Oudin potential evapotranspiration, it is advised, when possible, to use either station temperature or gridded temperature data to calculate PE and then average these PE values at the basin scale.
+
 In the \code{JD} argument, the Julian day of the year of the 1st of January is equal to 1 and the 31st of December to 365 (366 in leap years). If the Julian day of the year is computed on an object of the \code{POSIXlt} class, the user has to add 1 to the returned value (e.g. \code{as.POSIXlt("2016-12-31")$yday + 1}).
 
 When hourly temperature is provided, all the values of the same day have to be set to the same Julian day of the year (e.g. \code{as.POSIXlt("2016-12-31 00:00:00")$yday + 1} and \code{as.POSIXlt("2016-12-31 00:01:00")$yday + 1}). Each single day must be provided 24 identical Julian day values (one for each hour).