diff --git a/doc/org.eclipse.cdt.doc.user/concepts/cdt_c_before_you_begin.htm b/doc/org.eclipse.cdt.doc.user/concepts/cdt_c_before_you_begin.htm
index 7152daf9c57..34058b5a6c9 100644
--- a/doc/org.eclipse.cdt.doc.user/concepts/cdt_c_before_you_begin.htm
+++ b/doc/org.eclipse.cdt.doc.user/concepts/cdt_c_before_you_begin.htm
@@ -33,7 +33,9 @@ It provides a compatibility layer in a set of DLLs. These DLLs are
 <a href="http://www.gnu.org/copyleft/gpl.html">GPL licensed</a>,
 making any code that links to them also subject to the GPL.
 Cygwin, however, does provide the fullest implementation of the GNU toolchain
-by supporting the GNU libc C runtime library.
+by supporting the GNU libc C runtime library. 
+Note: currently Cygwin &gt;= version 3.4.4-999 is not supported since gcc and g++ commands cannot 
+be launched from the windows' native shell.
 <p> <br></p>
 </li>
 <li><p><a href="http://www.mingw.org"><b>MinGW</b></a> is a port of the GNU toolchain to the Windows platform.