diff --git a/ChangeLog b/ChangeLog
index 6a324c716..1e42553ec 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -68,6 +68,8 @@
    - djm@cvs.openbsd.org 2011/05/04 21:15:29
      [authfile.c authfile.h ssh-add.c]
      allow "ssh-add - < key"; feedback and ok markus@
+ - (tim) [configure.ac] Add AC_LANG_SOURCE to OPENSSH_CHECK_CFLAG_COMPILE
+   so autoreconf 2.68 is happy.
 
 20110221
  - (dtucker) [contrib/cygwin/ssh-host-config] From Corinna: revamp of the
diff --git a/configure.ac b/configure.ac
index 573c09710..5357cab60 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-# $Id: configure.ac,v 1.472 2011/05/05 03:48:37 djm Exp $
+# $Id: configure.ac,v 1.473 2011/05/05 04:44:25 tim Exp $
 #
 # Copyright (c) 1999-2004 Damien Miller
 #
@@ -15,7 +15,7 @@
 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 AC_INIT([OpenSSH], [Portable], [openssh-unix-dev@mindrot.org])
-AC_REVISION($Revision: 1.472 $)
+AC_REVISION($Revision: 1.473 $)
 AC_CONFIG_SRCDIR([ssh.c])
 AC_LANG([C])
 
@@ -24,7 +24,7 @@ AC_DEFUN([OPENSSH_CHECK_CFLAG_COMPILE], [{
 	AC_MSG_CHECKING([if $CC supports $1])
 	saved_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS $1"
-	AC_COMPILE_IFELSE([void main(void) { return 0; }],
+	AC_COMPILE_IFELSE([AC_LANG_SOURCE([[void main(void) { return 0; }]])],
 		[ AC_MSG_RESULT([yes]) ],
 		[ AC_MSG_RESULT([no])
 		  CFLAGS="$saved_CFLAGS" ]