diff --git a/CSC/exD.html b/CSC/exD.html
index 30fdb90..6da191a 100644
--- a/CSC/exD.html
+++ b/CSC/exD.html
@@ -62,7 +62,8 @@ <h1>Exercise D: Experiment with CppUnit</h1>
 
 These aren't real tests, of course, but rather demonstrations of what can easily be tested 
 and what happens when they pass or fail. In this case, the first test will fail.
-To see that, make and run the tests:
+To see that, make and run the tests (see below about failures; you'll probably have to rebuild 
+CppUnit the first time through):
 
 <CODE><PRE>
     make