diff --git a/matlab/model_diagnostics.m b/matlab/model_diagnostics.m
index c1f7b0e1e597ed3028243d22edc737a876c16c33..950de6bf13fbbb11a2e32ba89d91fc906b99cd41 100644
--- a/matlab/model_diagnostics.m
+++ b/matlab/model_diagnostics.m
@@ -109,7 +109,7 @@ if info
 end
 
 % check if ys is steady state
-options.debug=1; %locally set debug option to 1
+options.debug=true; %locally set debug option to true
 if options.logged_steady_state %if steady state was previously logged, undo this
     oo.dr.ys=exp(oo.dr.ys);
     oo.steady_state=exp(oo.steady_state);