diff --git a/robust_control/two_mass_system.m b/robust_control/two_mass_system.m
index 4b57653..e22c1f6 100644
--- a/robust_control/two_mass_system.m
+++ b/robust_control/two_mass_system.m
@@ -89,6 +89,11 @@ else
     disp('Nominal closed loop is stable');
 end
 
+if hinfnorm(S*Ws) <= 1
+    disp('Nominal performance specifications on sensitivity are met')
+else
+    disp('Nominal performance specifications on sensitivity are not met')
+end
 %% close figures
 close all;