diff --git a/src/DynareModel.jl b/src/DynareModel.jl
index 651a6bfb50aea3960a60f37f50a311884ed140d8..a66d38398781ea567448c2e3058e48da4ee38038 100644
--- a/src/DynareModel.jl
+++ b/src/DynareModel.jl
@@ -127,6 +127,7 @@ mutable struct Model
     orig_maximum_exo_lead::Int
     orig_maximum_exo_det_lag::Int
     orig_maximum_exo_det_lead::Int
+    orig_maximum_lag_with_diffs_expanded::Int
     lead_lag_incidence::Matrix{Int}
     nnzderivatives::Vector{Int}
     analytical_steady_state::Bool
@@ -190,6 +191,7 @@ function dynare_model()
                  0,                          # orig_maximum_exo_lead
                  0,                          # orig_maximum_exo_det_lag
                  0,                          # orig_maximum_exo_det_lead
+                 0,                          # orig_maximum_lag_with_diffs_expanded
                  Matrix{Int}(undef,0,0),     # lead_lag_incidence
                  zeros(Int64,3),             # nnzderivatives
                  false,                      # analytical_steady_state