diff --git a/DESCRIPTION b/DESCRIPTION
index 45fdd76833a4bd54ffe3a83e1b6657fd5588b43a..3dd58968d74025a9dbbf4af62e048dff7ae48e87 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,8 +1,8 @@
 Package: airGR
 Type: Package
 Title: Suite of GR Hydrological Models for Precipitation-Runoff Modelling
-Version: 1.0.9.52
-Date: 2017-10-23
+Version: 1.0.9.53
+Date: 2017-10-26
 Authors@R: c(
   person("Laurent", "Coron", role = c("aut", "trl")),
   person("Charles", "Perrin", role = c("aut", "ths")),
diff --git a/NEWS.rmd b/NEWS.rmd
index f06bc248b41db95abac74b9cc144983c6c57f167..4911200267d340b0d9d2ea18b042193177cb8670 100644
--- a/NEWS.rmd
+++ b/NEWS.rmd
@@ -14,7 +14,7 @@ output:
 
 
 
-### 1.0.9.52 Release Notes (2017-10-23) 
+### 1.0.9.53 Release Notes (2017-10-26) 
 
 #### New features
 
diff --git a/R/Calibration_Michel.R b/R/Calibration_Michel.R
index 581c2d9e90228d7356c80be3e64de14001c65d06..f5433f500780977be388a9a44d1f34d07aba0324 100644
--- a/R/Calibration_Michel.R
+++ b/R/Calibration_Michel.R
@@ -341,12 +341,7 @@ Calibration_Michel <- function(InputsModel, RunOptions, InputsCrit, CalibOptions
       VectPace <- NewParamOptimT-OldParamOptimT
       for (iC in 1:NParam) {
         if (OptimParam[iC]) { 
-          if (VectPace[iC] != 0) {
-            PaceDiag[iC] <- CLG * PaceDiag[iC] + (1-CLG) * VectPace[iC]
-          }
-          if (VectPace[iC] == 0) {
-            PaceDiag[iC] <- CLG*PaceDiag[iC]
-          }
+          PaceDiag[iC] <- CLG * PaceDiag[iC] + (1-CLG) * VectPace[iC]
         }
       }
     } else {