diff --git a/CICE/CMakeLists.txt b/CICE/CMakeLists.txt
index 77b073e..16f2c8a 100644
--- a/CICE/CMakeLists.txt
+++ b/CICE/CMakeLists.txt
@@ -31,6 +31,7 @@ endif()
 add_fortran_library(cice mod STATIC ${lib_src_files})
 target_compile_definitions(cice PUBLIC "${_cice_defs}")
 target_link_libraries(cice PUBLIC share cdeps_common esmf)
+add_patched_source(cice CICE/cicecore/drivers/nuopc/cmeps/ice_mesh_mod.F90)
 
 if(CICE_IO MATCHES "^(NetCDF|PIO)$")
   target_link_libraries(cice PUBLIC NetCDF::NetCDF_Fortran)
diff --git a/CICE/cice_files.cmake b/CICE/cice_files.cmake
index e631e30..b95b1a6 100644
--- a/CICE/cice_files.cmake
+++ b/CICE/cice_files.cmake
@@ -148,5 +148,4 @@ list(APPEND cice_nuopc_cmeps_driver_files
   CICE/cicecore/drivers/nuopc/cmeps/ice_prescribed_mod.F90
   CICE/cicecore/drivers/nuopc/cmeps/ice_scam.F90
   CICE/cicecore/drivers/nuopc/cmeps/ice_shr_methods.F90
-  CICE/cicecore/drivers/nuopc/cmeps/ice_mesh_mod.F90
 )
diff --git a/CICE/patches/ice_mesh_mod.F90.patch b/CICE/patches/ice_mesh_mod.F90.patch
new file mode 100644
index 0000000..932d6fa
--- /dev/null
+++ b/CICE/patches/ice_mesh_mod.F90.patch
@@ -0,0 +1,21 @@
+--- ice_mesh_mod.F90.old	2023-08-28 08:55:07.881394000 +1000
++++ ice_mesh_mod.F90.new	2023-09-18 10:11:53.058232000 +1000
+@@ -668,13 +668,13 @@
+     n=0
+     do iblk = 1, nblocks
+        this_block = get_block(blocks_ice(iblk),iblk)
++       ilo = this_block%ilo
++       ihi = this_block%ihi
++       jlo = this_block%jlo
++       jhi = this_block%jhi
+        do j = jlo, jhi
+-          jlo = this_block%jlo
+-          jhi = this_block%jhi
+           do i = ilo, ihi
+-             ilo = this_block%ilo
+-             ihi = this_block%ihi
+-             n = n+1
++             n = n + 1
+              mask_internal = nint(hm(i,j,iblk),kind=dbl_kind)
+              mask_file = model_mask(n)
+              if (mask_internal /= mask_file) then