diff --git a/matlab/dynare_estimation_init.m b/matlab/dynare_estimation_init.m
index 3e4b77ae9f7b0bc0dfe3fe1a7c3842bef751465d..7e5c3483d4ba1c763afb95661eef7b4d3fc488e6 100644
--- a/matlab/dynare_estimation_init.m
+++ b/matlab/dynare_estimation_init.m
@@ -151,7 +151,7 @@ if ~isempty(estim_params_)
     ub = bounds(:,2);
     bayestopt_.lb = lb;
     bayestopt_.ub = ub;
-else% If estim_params_ is empty...
+else% If estim_params_ is empty (e.g. when running the smoother on a calibrated model)
     xparam1 = [];
     bayestopt_.lb = [];
     bayestopt_.ub = [];