diff --git a/reproducibility_tests/ref_counter.jl b/reproducibility_tests/ref_counter.jl
index a9e1c8ae87..2895d5190b 100644
--- a/reproducibility_tests/ref_counter.jl
+++ b/reproducibility_tests/ref_counter.jl
@@ -1,4 +1,4 @@
-239
+240
 
 # **README**
 #
@@ -20,6 +20,9 @@
 
 
 #=
+240
+- Fix a bug in viscous sponge
+
 239
 - Update mixing length formulation
 
diff --git a/src/prognostic_equations/remaining_tendency.jl b/src/prognostic_equations/remaining_tendency.jl
index 945b2b9b58..a8929739a3 100644
--- a/src/prognostic_equations/remaining_tendency.jl
+++ b/src/prognostic_equations/remaining_tendency.jl
@@ -38,7 +38,7 @@ NVTX.@annotate function additional_tendency!(Yₜ, Y, p, t)
 
     (; ᶜh_tot, ᶜspecific) = p.precomputed
     ᶜuₕ = Y.c.uₕ
-    ᶠu₃ = Yₜ.f.u₃
+    ᶠu₃ = Y.f.u₃
     ᶜρ = Y.c.ρ
     (; forcing_type, moisture_model, rayleigh_sponge, viscous_sponge) = p.atmos
     (; ls_adv, edmf_coriolis) = p.atmos