diff --git a/ChangeLog b/ChangeLog
index c0f87a0a1d..4f3d50f820 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Apr 27 16:47:12 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* configure.in (ruby_version): uses sed instead of grep if the
+	  result is need, to get rid of GREP_OPTIONS.  [ruby-dev:38336]
+
 Mon Apr 27 01:25:11 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/readline/readline.c (readline_getc): use rl_getc_function if
diff --git a/configure.in b/configure.in
index fe99222ba4..e11316af42 100644
--- a/configure.in
+++ b/configure.in
@@ -2305,7 +2305,7 @@ if test ${RUBY_LIB_VERSION_STYLE+set}; then
     echo '#include "version.h"'
     echo 'ruby_version=RUBY_LIB_VERSION'
     } > conftest.c
-    ruby_version="`$CPP -I"${srcdir}" conftest.c | grep '^ruby_version=' | tr -d ' '`"
+    ruby_version="`$CPP -I"${srcdir}" conftest.c | sed '/^ruby_version=/!d;s/ //g'`"
     eval $ruby_version
 else
     RUBY_LIB_VERSION="\"${ruby_version}\""