diff --git a/matlab/+mom/Jtest.m b/matlab/+mom/Jtest.m
index 955756fb1dc78dff0f9389f3972dc9d6bf34c1b9..06f4eccc126b3048e377b6e6c41bad4d35de7506 100644
--- a/matlab/+mom/Jtest.m
+++ b/matlab/+mom/Jtest.m
@@ -70,4 +70,6 @@ if options_mom_.mom.mom_nbr > length(xparam)
     J_test.p_val           = 1-chi2cdf(J_test.j_stat, J_test.degrees_freedom);
     fprintf('\nValue of J-test statistic: %f\n',J_test.j_stat);
     fprintf('p-value of J-test statistic: %f\n',J_test.p_val);
+else
+    J_test=[];
 end
\ No newline at end of file