diff --git a/matlab/osr.m b/matlab/osr.m
index d48cd3e679e032ca62931387ea1d44ceca58d0f5..8d03864ed65f88dc5b970461737a91a7e80199dd 100644
--- a/matlab/osr.m
+++ b/matlab/osr.m
@@ -41,7 +41,6 @@ function osr_res = osr(var_list,params,i_var,W)
 global M_ options_ oo_  
 
 options_.order = 1;
-options_ = set_default_option(options_,'simul',0);
 
 if isempty(options_.qz_criterium)
     options_.qz_criterium = 1+1e-6;