diff --git a/examples/freely_decaying_mediterraneum.jl b/examples/freely_decaying_mediterraneum.jl
index a32f7479..ac068612 100644
--- a/examples/freely_decaying_mediterraneum.jl
+++ b/examples/freely_decaying_mediterraneum.jl
@@ -13,7 +13,7 @@ using Oceananigans.Coriolis: ActiveCellEnstrophyConserving
 ##### Regional Mediterranean grid 
 #####
 
-function regrid_ecco_tracers_to_grid(grid)
+function regrid_ecco_tracers(grid)
     Tecco = ecco2_field(:temperature)
     Secco = ecco2_field(:salinity)
     
@@ -25,6 +25,7 @@ function regrid_ecco_tracers_to_grid(grid)
     T = CenterField(grid)
     S = CenterField(grid)
     
+    # Regrid to our grid!
     three_dimensional_regrid!(T, Tecco)
     three_dimensional_regrid!(S, Secco)
     
@@ -52,7 +53,7 @@ h = regrid_bathymetry(grid, height_above_water=1)
 
 grid = ImmersedBoundaryGrid(grid, GridFittedBottom(h))
 
-T, S = regrid_ecco_tracers_to_grid(grid)
+T, S = regrid_ecco_tracers(grid)
 
 mask_immersed_field!(T)
 mask_immersed_field!(S)
diff --git a/src/DataWrangling/ECCO2.jl b/src/DataWrangling/ECCO2.jl
index 0b03deeb..186f72d2 100644
--- a/src/DataWrangling/ECCO2.jl
+++ b/src/DataWrangling/ECCO2.jl
@@ -112,12 +112,17 @@ function ecco2_field(variable_name;
     return field
 end
 
+@kernel function _set_ecco2_mask!(mask, Tᵢ, minimum_value)
+    i, j, k = @index(Global, NTuple)
+    @inbounds mask[i, j, k] = ifelse(Tᵢ[i, j, k] < minimum_value, 0, 1)
+end
+
 function ecco2_center_mask(architecture = CPU(); minimum_value = Float32(-1e5))
     Tᵢ   = ecco2_field(:temperature; architecture)
     mask = CenterField(Tᵢ.grid)
 
     # Set the mask with ones where T is defined
-    set!(mask, (!).(Tᵢ .< minimum_value))
+    launch!(architecture, Tᵢ.grid, _set_ecco2_mask!, mask, Tᵢ, minimum_value)
 
     return mask
 end