--- a/inst/dataframe
+++ b/inst/dataframe
@@ -98,7 +98,7 @@
 %! x("Freq");
 %!test
 %! # complex access
-%! x(x(:, "OK_") == '?', ["C"; "G"]) = NaN;
+%! x(x(:, "OK_") == '?', ["C"; "G*"]) = NaN;
 %!assert(x.array(4, 5:6), [NaN NaN])
 %! # extract values
 %! y = x.dataframe(x(:, "OK_") =='A', {"Freq", "VB*", "C", "G"});