diff --git a/Detectors/MUON/MCH/Base/include/MCHBase/ResponseParam.h b/Detectors/MUON/MCH/Base/include/MCHBase/ResponseParam.h
index a545bb670d59b..6dba967694026 100644
--- a/Detectors/MUON/MCH/Base/include/MCHBase/ResponseParam.h
+++ b/Detectors/MUON/MCH/Base/include/MCHBase/ResponseParam.h
@@ -30,11 +30,11 @@ struct ResponseParam : public o2::conf::ConfigurableParamHelper<ResponseParam> {
   float pitchSt1 = 0.21;    ///< anode-cathode pitch (cm) for station 1
   float pitchSt2345 = 0.25; ///< anode-cathode pitch (cm) for station 2 to 5
 
-  float mathiesonSqrtKx3St1 = 0.7000;    ///< Mathieson parameter sqrt(K3) in x direction for station 1
-  float mathiesonSqrtKx3St2345 = 0.7131; ///< Mathieson parameter sqrt(K3) in x direction for station 2 to 5
+  float mathiesonSqrtKx3St1 = 0.5477;    ///< Mathieson parameter sqrt(K3) in x direction for station 1
+  float mathiesonSqrtKx3St2345 = 0.5477; ///< Mathieson parameter sqrt(K3) in x direction for station 2 to 5
 
-  float mathiesonSqrtKy3St1 = 0.7550;    ///< Mathieson parameter sqrt(K3) in y direction for station 1
-  float mathiesonSqrtKy3St2345 = 0.7642; ///< Mathieson parameter sqrt(K3) in y direction for station 2 to 5
+  float mathiesonSqrtKy3St1 = 0.5477;    ///< Mathieson parameter sqrt(K3) in y direction for station 1
+  float mathiesonSqrtKy3St2345 = 0.5477; ///< Mathieson parameter sqrt(K3) in y direction for station 2 to 5
 
   float chargeSlopeSt1 = 25.;    ///< charge slope used in E to charge conversion for station 1
   float chargeSlopeSt2345 = 10.; ///< charge slope used in E to charge conversion for station 2 to 5