--- a/scripts/signal/arch_rnd.m
+++ b/scripts/signal/arch_rnd.m
@@ -23,17 +23,17 @@
 ## coefficients @var{b} and CH coefficients @var{a}.  I.e., the result
 ## @math{y(t)} follows the model
 ##
-## @example
+## @smallexample
 ## y(t) = b(1) + b(2) * y(t-1) + @dots{} + b(lb) * y(t-lb+1) + e(t),
-## @end example
+## @end smallexample
 ##
 ## @noindent
 ## where @math{e(t)}, given @var{y} up to time @math{t-1}, is
 ## @math{N(0, h(t))}, with
 ##
-## @example
+## @smallexample
 ## h(t) = a(1) + a(2) * e(t-1)^2 + @dots{} + a(la) * e(t-la+1)^2
-## @end example
+## @end smallexample
 ## @end deftypefn
 
 ## Author: KH <Kurt.Hornik@wu-wien.ac.at>