diff --git a/src/prognostic_equations/forcing/external_forcing.jl b/src/prognostic_equations/forcing/external_forcing.jl
index 5ae4ee3f38..34bcdb2d1d 100644
--- a/src/prognostic_equations/forcing/external_forcing.jl
+++ b/src/prognostic_equations/forcing/external_forcing.jl
@@ -378,7 +378,7 @@ function external_forcing_cache(
 end
 
 # ISDAC external forcing (i.e. nudging)
-external_forcing_cache(Y, external_forcing::ISDACForcing, params) = (;)  # Don't need to cache anything
+external_forcing_cache(Y, external_forcing::ISDACForcing, params, _) = (;)  # Don't need to cache anything
 function external_forcing_tendency!(Yₜ, Y, p, t, ::ISDACForcing)
     FT = Spaces.undertype(axes(Y.c))
     (; params) = p