diff --git a/ChangeLog b/ChangeLog
index 00381b7b72..52cd4818a6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu May 31 01:25:59 2001  Akinori MUSHA  <knu@iDaemons.org>
+
+	* configure.in: default --with-libc_r to `no' until the problem is
+	  fixed. (FreeBSD only)
+
 Tue May 29 17:24:23 2001  K.Kosako  <kosako@sofnec.co.jp>
 
 	* ruby.c (proc_options): unexpected SecurityError happens when -T4.
diff --git a/configure.in b/configure.in
index 620e28bd62..f565695b6a 100644
--- a/configure.in
+++ b/configure.in
@@ -183,7 +183,7 @@ AC_ARG_WITH(libc_r,
 	case $withval in
 	yes) with_libc_r=yes;;
 	*)   with_libc_r=no;;
-	esac], [with_libc_r=yes])
+	esac], [with_libc_r=no])
 
 dnl Checks for libraries.
 case "$target_os" in