diff --git a/ChangeLog b/ChangeLog
index 1ee96b1b..355b4854 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2010-08-31  Peter Rosin  <peda@lysator.liu.se>
 
+	Dump archiver output to the log when testing @file support.
+	* libltdl/m4/libtool.m4 (_LT_PROG_AR): Redirect stdout to config.log
+	when testing for @file support.
+	Suggested by Ralf Wildenhues.
+
 	Silence archiver output when testing @file support.
 	* libltdl/m4/libtool.m4 (_LT_PROG_AR): Redirect stdout and stderr
 	to the bit bucket when testing for @file support.
diff --git a/libltdl/m4/libtool.m4 b/libltdl/m4/libtool.m4
index 530c971e..666130d7 100644
--- a/libltdl/m4/libtool.m4
+++ b/libltdl/m4/libtool.m4
@@ -1360,7 +1360,7 @@ AC_CACHE_CHECK([for archiver @FILE support], [lt_cv_ar_at_file],
   [lt_cv_ar_at_file=no
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM],
      [echo conftest.$ac_objext > conftest.lst
-      lt_ar_try='$AR $AR_FLAGS libconftest.a @conftest.lst >/dev/null 2>&1'
+      lt_ar_try='$AR $AR_FLAGS libconftest.a @conftest.lst >&AS_MESSAGE_LOG_FD'
       AC_TRY_EVAL([lt_ar_try])
       if test "$ac_status" -eq 0; then
 	# Ensure the archiver fails upon bogus file names.