diff --git a/INSTALL b/INSTALL
index 9a87d9a..c24cdca 100644
--- a/INSTALL
+++ b/INSTALL
@@ -13,4 +13,15 @@ Run make and optionally 'make install'.
 If you manually want to install, copy proxytunnel to /usr/local/bin
 and optionally the manual-page from the debian-subdirectory to your manpath
 
+---------------------------------------------------------------------------------
+Cygwin:
 
+Currently cygwin's openssl isn't in a compilable state, change md4.h and md5.h in /usr/include
+and replace 'size_t' with 'unsigned long'
+To link the final executable:
+gcc -o proxytunnel *.o /lib/libcrypto.dll.a /lib/libssl.dll.a
+
+To run, copy the required dll's from the cygwin-bin dir to the windows system dir,
+or the proxytunnel directory (cygcrypto-0.9.8.dll, cygssl-0.9.8.dll, cygwin1.dll )
+
+Setproctitle doesn't work on cygwin (afaik)