diff --git a/doc/history.adoc b/doc/history.adoc
index 38b31e9..7b6b76f 100644
--- a/doc/history.adoc
+++ b/doc/history.adoc
@@ -16,6 +16,7 @@ http://www.boost.org/LICENSE_1_0.txt)
 * Add CI testing on FreeBSD for clang and gcc.
 * Add `WORD_BITS` set of predefs to detect the architecture word size.
   Initial implementation inspired by submission from Mikhail Komarov.
+* Add CI testing for Cygwin 32 and 64.
 
 == 1.11
 
diff --git a/doc/index.html b/doc/index.html
index f8d328f..a799041 100644
--- a/doc/index.html
+++ b/doc/index.html
@@ -6861,6 +6861,9 @@ expressions. It defaults to "c++", but can be any of: "c", "cpp",
 <p>Add <code>WORD_BITS</code> set of predefs to detect the architecture word size.
 Initial implementation inspired by submission from Mikhail Komarov.</p>
 </li>
+<li>
+<p>Add CI testing for Cygwin 32 and 64.</p>
+</li>
 </ul>
 </div>
 </div>