--- a/scripts/miscellaneous/orderfields.m
+++ b/scripts/miscellaneous/orderfields.m
@@ -108,14 +108,14 @@
       ## Two structures: return the fields in the order of s2.
       names = fieldnames (s2);
       if (! isequal (sort (fieldnames (s1)), sort (names)))
-	error ("orderfields: structures do not have same fields");
+        error ("orderfields: structures do not have same fields");
       endif
     elseif (iscellstr (s2))
       ## A structure and a list of fields: order by the list of fields.
       t1 = sort (fieldnames (s1));
       t2 = sort (s2(:));
       if (! isequal (t1, t2))
-	error ("orderfields: name list does not match structure fields");
+        error ("orderfields: name list does not match structure fields");
       endif
       names = s2;
     elseif (isvector (s2))
@@ -125,7 +125,7 @@
       t1 = t1(:)';
       t2 = 1:numel (names);
       if (! isequal (t1, t2))
-	error ("orderfields: invalid permutation vector");
+        error ("orderfields: invalid permutation vector");
       endif
       names = names (s2);
     endif