diff --git a/matlab/sim1_purely_forward.m b/matlab/sim1_purely_forward.m
index d1e938d3c4d1b1f9a3444d1941f554763f2bcea6..68a6714b81ee73c610c12855f914a26363d35bdb 100644
--- a/matlab/sim1_purely_forward.m
+++ b/matlab/sim1_purely_forward.m
@@ -39,7 +39,7 @@ function sim1_purely_forward()
                              1, 1, options_.gstep, options_.solve_tolf, ...
                              options_.solve_tolx, options_.simul.maxit, ...
                              options_.debug,oo_.exo_simul, M_.params, oo_.steady_state, ...
-                             it);
+                             it+M_.maximum_lag);
 
         if info
             skipline(2);
@@ -50,4 +50,4 @@ function sim1_purely_forward()
 
         oo_.endo_simul(:,it) = tmp(1:M_.endo_nbr);
     end
-    
\ No newline at end of file
+