diff --git a/ChangeLog b/ChangeLog
index ad81cc15ae..b9041c3851 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Nov 28 03:03:28 2012  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* configure.in (opt-dir): don't use non portable flag -E of sed.
+
 Wed Nov 28 02:55:35 2012  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* configure.in (ARCH_FLAG): __sync_val_compare_and_swap_4 needs
diff --git a/configure.in b/configure.in
index a543fe7f52..1901721f6d 100644
--- a/configure.in
+++ b/configure.in
@@ -2353,7 +2353,7 @@ AC_ARG_WITH(opt-dir,
 		val=`IFS="$PATH_SEPARATOR"
 		    for dir in $withval; do
 			echo x ${LIBPATHFLAG} ${RPATHFLAG} |
-			sed -E 's/^x *//;s'"${PATH_SEPARATOR}"'%1\\$-s|%s'"${IFS}${dir}/lib${IFS}g"
+			sed "s/^x *//;s${IFS}"'%1\\$-s'"${IFS}${dir}/lib${IFS}g;s${IFS}%s${IFS}${dir}/lib${IFS}g"
 		    done | tr '\012' ' '`
 		set +x
 		LDFLAGS="$LDFLAGS${LDFLAGS:+ }$val"