diff --git a/macro/mcbm/geometry/tof/Create_TOF_Geometry_v20b_cosmicHD.C b/macro/mcbm/geometry/tof/Create_TOF_Geometry_v20b_cosmicHD.C
index 34ff9e87a3f14323d13de361d5370d05309858e8..485d0dc76f50da97ee09dec9780c7045ff5e715c 100644
--- a/macro/mcbm/geometry/tof/Create_TOF_Geometry_v20b_cosmicHD.C
+++ b/macro/mcbm/geometry/tof/Create_TOF_Geometry_v20b_cosmicHD.C
@@ -188,7 +188,7 @@ const Float_t Star2_X_Offset[Star2_NTypes]={0.}; //{62.};
 
 const Float_t Buc_First_Z_Position=TOF_Z_Front + 48.4;
 const Float_t Buc_Delta_Z_Position=0.;
-const Float_t Buc_First_Y_Position=-6.;  // 
+const Float_t Buc_First_Y_Position=-9.;  // 
 const Float_t Buc_Delta_Y_Position=12.;   // 
 const Float_t Buc_rotate_Z=180.;
 const Float_t Buc_rotate_X=180.;