diff -r 322120e880c5 -r f39e01e9c489 Admin/PLATFORMS
--- a/Admin/PLATFORMS	Sat Aug 26 18:58:40 2017 +0200
+++ b/Admin/PLATFORMS	Mon Aug 28 19:06:00 2017 +0200
@@ -40,7 +40,7 @@
 
   x86-windows       Windows 7
   x86_64-windows    Windows 7
-  x86-cygwin        Cygwin 2.6 http://isabelle.in.tum.de/cygwin_2016-1 (x86/release)
+  x86-cygwin        Cygwin 2.8 http://isabelle.in.tum.de/cygwin_2017 (x86/release)
 
 All of the above platforms are 100% supported by Isabelle -- end-users
 should not have to care about the differences (at least in theory).