diff --git a/matlab/global_initialization.m b/matlab/global_initialization.m
index 4e9f134a0..1cd4e2025 100644
--- a/matlab/global_initialization.m
+++ b/matlab/global_initialization.m
@@ -195,6 +195,8 @@ function global_initialization()
   oo_.exo_det_steady_state = [];
   oo_.exo_det_simul = [];
 
+  M_.params = [];
+  
   % Variance matrix for measurement errors
   M_.H = 0;