diff --git a/documentation/preface.html b/documentation/preface.html
index 9afaddd9f..b18065c34 100644
--- a/documentation/preface.html
+++ b/documentation/preface.html
@@ -97,7 +97,7 @@ HREF="license.html">Appendix A</A>.</B>
 	<DD>The Microsoft Windows 32-bit Application Programmer's Interface.</DD>
 
 	<DT>MacOS</DT>
-	<DD>The Apple Macintosh OS 8.6 and later, including OS X.<DD>
+	<DD>The Apple Macintosh OS 8.6 and later, including OS X.</DD>
 
 </DL>