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diff --git a/doc/reference.texi b/doc/reference.texi
index 0c577f7..463f728 100644
--- a/doc/reference.texi
+++ b/doc/reference.texi
@@ -840,6 +840,9 @@ char get (void) @{
 @node Memory Barriers
 @subsection Memory Barriers
 
+@c We should try to come up with a better example.
+@c Perhaps something with a linked list?
+
 Suppose we add a ``feature'' that, whenever a timer interrupt
 occurs, the character in global variable @code{timer_put_char} is
 printed on the console, but only if global Boolean variable