diff --git a/model/fv_regional_bc.F90 b/model/fv_regional_bc.F90
index 98285b7a3..e3b633256 100644
--- a/model/fv_regional_bc.F90
+++ b/model/fv_regional_bc.F90
@@ -4409,6 +4409,12 @@ subroutine regional_boundary_update(array                       &
             j1=jsd
             j2=jed
 !
+! CHJ --- s ---
+            if(trim(bc_vbl_name)=='vc'.or.trim(bc_vbl_name)=='u')then
+              j2=jed+1
+            endif
+! CHJ --- e ---
+
             i1=isd
             i2=is-1
 !
@@ -4453,7 +4459,13 @@ subroutine regional_boundary_update(array                       &
 !
             j1=jsd
             j2=jed
-!
+
+! CHJ --- s ---
+            if(trim(bc_vbl_name)=='vc'.or.trim(bc_vbl_name)=='u')then
+              j2=jed+1
+            endif
+! CHJ --- e ---
+
             i1=ie+1
             i2=ied
             if(trim(bc_vbl_name)=='uc'.or.trim(bc_vbl_name)=='v')then