diff --git a/src/theory.jl b/src/theory.jl
index 5988772..63dd0fc 100755
--- a/src/theory.jl
+++ b/src/theory.jl
@@ -3,7 +3,8 @@ function Theory(cosmology::Cosmology,
                 idx, files;
                 Nuisances=Dict(),
                 res_wl=350, res_gc=1000,
-                int_wl="linear", int_gc="linear")
+                int_wl="linear", int_gc="linear",
+                smooth_gc=0)
     
     nui_type =  eltype(valtype(Nuisances))
     if !(nui_type <: Float64) & (nui_type != Any)
@@ -26,7 +27,7 @@ function Theory(cosmology::Cosmology,
             tracer = NumberCountsTracer(cosmology, zs .+ dz, nz;
                                         b=b, res=res_gc, 
                                         nz_interpolation=int_gc,
-                                        smooth=true)
+                                        smooth=smooth_gc)
         elseif t_type == "galaxy_shear"
             zs_mean, nz_mean = files[string("nz_", name)]
             m = get(Nuisances, string(name, "_", "m"), 0.0)
diff --git a/src/tracers.jl b/src/tracers.jl
index fadf547..7d1291c 100755
--- a/src/tracers.jl
+++ b/src/tracers.jl
@@ -28,7 +28,7 @@ Returns:
 - `NumberCountsTracer::NumberCountsTracer` : Number counts tracer structure.
 """
 NumberCountsTracer(cosmo::Cosmology, z_n, nz; 
-    b=1.0, res=1000, nz_interpolation="linear", smooth=false) = begin
+    b=1.0, res=1000, nz_interpolation="linear", smooth=0) = begin
     z_w, nz_w = nz_interpolate(z_n, nz, res;
         mode=nz_interpolation)
     nz_norm = integrate(z_w, nz_w, SimpsonEven())
@@ -37,8 +37,8 @@ NumberCountsTracer(cosmo::Cosmology, z_n, nz;
     hz = Hmpc(cosmo, z_w)
     
     w_arr = @. (nz_w*hz/nz_norm)
-    if smooth
-        w_arr = smooth_w_neighbors(w_arr)
+    if smooth!=0
+        w_arr = smooth_w_neighbors(w_arr, k=smooth)
     end
     wint = linear_interpolation(chi, b .* w_arr, extrapolation_bc=Line())
     F::Function = ℓ -> 1