1 files changed, 8 insertions, 1 deletions

diff --git a/doc/ext_jit.html b/doc/ext_jit.html
index d621476b..0d056b35 100644
--- a/doc/ext_jit.html
+++ b/doc/ext_jit.html
@@ -127,9 +127,16 @@ Contains the version number of the LuaJIT core. Version xx.yy.zz
 is represented by the decimal number xxyyzz.
 </p>
 
+<h3 id="jit_os"><tt>jit.os</tt></h3>
+<p>
+Contains the target OS name:
+"Windows", "Linux", "OSX", "BSD", "Posix" or "Other".
+</p>
+
 <h3 id="jit_arch"><tt>jit.arch</tt></h3>
 <p>
-Contains the target architecture name (CPU and optional ABI).
+Contains the target architecture name:
+"x86", "x64" or "ppcspe".
 </p>
 
 <h2 id="jit_opt"><tt>jit.opt.*</tt> &mdash; JIT compiler optimization control</h2>