diff --git a/DESCRIPTION b/DESCRIPTION
index 02e1ad18f07a0263d73121b3f1de70abc49141d2..c0473074da506b3814b745ac3ee15fbc72cc7e0d 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: airGR
 Type: Package
 Title: Suite of GR Hydrological Models for Precipitation-Runoff Modelling
-Version: 1.3.0.17
+Version: 1.3.0.18
 Date: 2019-05-21
 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 39370af9e5f091d015837de913f13897875158da..e5de3ce0523d7ecb539e35bab7ac0ff6d96632b2 100644
--- a/NEWS.rmd
+++ b/NEWS.rmd
@@ -14,7 +14,7 @@ output:
 
 
 
-### 1.3.0.17 Release Notes (2019-05-21)
+### 1.3.0.18 Release Notes (2019-05-21)
 
 
 #### New features
diff --git a/R/RunModel_CemaNeigeGR4H.R b/R/RunModel_CemaNeigeGR4H.R
index 2247f5731251d0c7995b7f61655299eb62308310..a9526bf67e27700ec7688f2326424f5e408756a7 100644
--- a/R/RunModel_CemaNeigeGR4H.R
+++ b/R/RunModel_CemaNeigeGR4H.R
@@ -31,7 +31,7 @@ RunModel_CemaNeigeGR4H <- function(InputsModel,RunOptions,Param){
         Param[3L] <- Param_X1X3_threshold
       }
       if (Param[4L] < Param_X4_threshold) {
-        warning(sprintf("Param[4] (X4: unit hydrograph time constant [d]) < %.2f\n X4 set to %.2f", Param_X4_threshold, Param_X4_threshold))
+        warning(sprintf("Param[4] (X4: unit hydrograph time constant [hour]) < %.2f\n X4 set to %.2f", Param_X4_threshold, Param_X4_threshold))
         Param[4L] <- Param_X4_threshold
       }