diff --git a/DESCRIPTION b/DESCRIPTION
index 842c7d74914727597602e6d1c669bc464aacd62f..daf24ee75c32cc8680f035f72a8703380bdc442e 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: airGR
 Type: Package
 Title: Suite of GR Hydrological Models for Precipitation-Runoff Modelling
-Version: 1.2.9.0
+Version: 1.2.9.1
 Date: 2019-03-12
 Authors@R: c(
   person("Laurent", "Coron", role = c("aut", "trl"), comment = c(ORCID = "0000-0002-1503-6204")),
diff --git a/NEWS.rmd b/NEWS.rmd
index 1c9aa29793ce59419808f918fc7844ece935a1c6..9c5b997554cf73e4fddf7c92e3d0664a4bb8d91d 100644
--- a/NEWS.rmd
+++ b/NEWS.rmd
@@ -13,7 +13,7 @@ output:
 
 
 
-### 1.2.9.0 Release Notes (2019-03-12) 
+### 1.2.9.1 Release Notes (2019-03-12) 
 
 
 
diff --git a/R/CreateCalibOptions.R b/R/CreateCalibOptions.R
index 944d636098ff3869eac142c8b68b12f91f264a58..e721c70b161c808d8da76acffd6a8b9f7609a113 100644
--- a/R/CreateCalibOptions.R
+++ b/R/CreateCalibOptions.R
@@ -10,7 +10,9 @@ CreateCalibOptions <- function(FUN_MOD,
     
     FUN_MOD     <- match.fun(FUN_MOD)
     FUN_CALIB   <- match.fun(FUN_CALIB)
-    FUN_TRANSFO <- match.fun(FUN_TRANSFO)
+    if(!is.null(FUN_TRANSFO)) {
+      FUN_TRANSFO <- match.fun(FUN_TRANSFO)
+    }
     
     ##check_FUN_MOD
     BOOL <- FALSE