diff --git a/matlab/resol.m b/matlab/resol.m
index edab18d1c..805ac3d46 100644
--- a/matlab/resol.m
+++ b/matlab/resol.m
@@ -86,7 +86,7 @@ if options.loglinear
     % Find variables with non positive steady state. Skip auxiliary
     % variables for lagges/leaded exogenous variables
     idx = find(dr.ys(get_all_variables_but_lagged_leaded_exogenous(M))<threshold);
-    if length(idx)
+    if ~isempty(idx)
         if options.debug
             variables_with_non_positive_steady_state = M.endo_names{idx};
             skipline()