diff --git a/compatibility.htm b/compatibility.htm
index 65acfd7..fb4d0a5 100644
--- a/compatibility.htm
+++ b/compatibility.htm
@@ -58,7 +58,7 @@ Calling <b>reset</b> with a pointer to the object that's already owned by the
 
 <ul>
 
-<li>The manipulation of use counts is now thread safe on Windows, Linux, and platforms
+<li>The manipulation of use counts is now <a name="threadsafe">thread safe</a> on Windows, Linux, and platforms
 that support pthreads. See the
 <a href="../../boost/detail/atomic_count.hpp">&lt;boost/detail/atomic_count.hpp&gt;</a>
 file for details</li>