diff --git a/ChangeLog b/ChangeLog
index 92b2e15305..b9a668ffef 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Feb 20 21:09:27 2012  Tanaka Akira  <akr@fsij.org>
+
+	* ext/curses/curses.c (Init_curses): define Curses::VERSION.
+
 Mon Feb 20 21:08:00 2012  Tanaka Akira  <akr@fsij.org>
 
 	* ext/curses/extconf.rb: restore $libs and $defs for each
diff --git a/ext/curses/curses.c b/ext/curses/curses.c
index fa4b279e26..6045e31d60 100644
--- a/ext/curses/curses.c
+++ b/ext/curses/curses.c
@@ -2768,6 +2768,12 @@ Init_curses(void)
     rb_define_module_function(mCurses, "def_prog_mode", curses_def_prog_mode, 0);
     rb_define_module_function(mCurses, "reset_prog_mode", curses_reset_prog_mode, 0);
 
+#ifdef NCURSES_VERSION
+    rb_define_const(mCurses, "VERSION", rb_sprintf("ncurses %s", NCURSES_VERSION));
+#else
+    rb_define_const(mCurses, "VERSION", rb_str_new2("unknown"));
+#endif
+
     /*
      * Document-class: Curses::Window
      *