diff --git a/documentation/RELEASE_NOTES.html b/documentation/RELEASE_NOTES.html
index d397e69e7..c291c26af 100644
--- a/documentation/RELEASE_NOTES.html
+++ b/documentation/RELEASE_NOTES.html
@@ -13,6 +13,16 @@
 
 <!-- Insert new items below here ... -->
 
+<h4>Cygwin Builds</h4>
+
+<p>The cygwin make version 3.81-1 does not handle MS-DOS path names and thus
+does not work for EPICS builds with RELEASE file definitions. From the
+discussion on the cygwin mailing list it looks like this will be fixed in make
+version 3.82. In the meantime make version 3.80 or a fixed make can be
+downloaded from
+<a href="https://projects.coin-or.org/BuildTools/wiki/current-issues">this
+website</a>.
+
 <h4>New Architectures</h4>
 
 <p>The following target architectures have been added to this release, although