diff --git a/matlab/identification_analysis.m b/matlab/identification_analysis.m
index 11a9de14e..c8a270c64 100644
--- a/matlab/identification_analysis.m
+++ b/matlab/identification_analysis.m
@@ -131,6 +131,7 @@ if info(1)==0,
             options_.irf = 0;
             options_.noprint = 1;
             options_.order = 1;
+            options_.SpectralDensity.trigger = 0;
             options_.periods = data_info.info.ntobs+100;
             if options_.kalman_algo > 2,
                 options_.kalman_algo = 1;