diff --git a/msdos/ChangeLog b/msdos/ChangeLog
index 10cb8c7daed..c649e736219 100644
--- a/msdos/ChangeLog
+++ b/msdos/ChangeLog
@@ -1,3 +1,7 @@
+2011-01-07  Eli Zaretskii  <eliz@gnu.org>
+
+	* sed2v2.inp (HAVE___BUILTIN_UNWIND_INIT): Define.
+
 2010-12-04  Andreas Schwab  <schwab@linux-m68k.org>
 
 	* sed1v2.inp (M_FILE, S_FILE): Add $(srcdir)/ prefix.
diff --git a/msdos/sed2v2.inp b/msdos/sed2v2.inp
index 3e77fe4f023..556764423b9 100644
--- a/msdos/sed2v2.inp
+++ b/msdos/sed2v2.inp
@@ -50,6 +50,7 @@
 /^#undef HAVE_MKSTEMP *$/s/^.*$/#define HAVE_MKSTEMP 1/
 /^#undef HAVE_STRUCT_TM_TM_ZONE *$/s/^.*$/#define HAVE_STRUCT_TM_TM_ZONE 1/
 /^#undef HAVE_SYNC *$/s/^.*$/#define HAVE_SYNC 1/
+/^#undef HAVE___BUILTIN_UNWIND_INIT *$/s/^.*$/#define HAVE___BUILTIN_UNWIND_INIT 1/
 /^#undef ORDINARY_LINK/s/^.*$/#define ORDINARY_LINK 1/
 /^#undef PACKAGE_BUGREPORT/s/^.*$/#define PACKAGE_BUGREPORT ""/
 /^#undef PACKAGE_NAME/s/^.*$/#define PACKAGE_NAME ""/