diff --git a/ChangeLog b/ChangeLog
index df5717ad2a..f93f61de2a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sat Feb  9 17:45:58 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* configure.in, version.c: prevent duplicated load paths by empty
+	  version string, it does not work right now.
+
 Sat Feb  9 17:38:41 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* configure.in: fix arch parameters in help message.  [Bug #7804]
diff --git a/configure.in b/configure.in
index 86b42a70d8..5eed90dfe2 100644
--- a/configure.in
+++ b/configure.in
@@ -3235,6 +3235,8 @@ if test ${RUBY_LIB_VERSION_STYLE+set}; then
     test -f verconf.h || > verconf.h
     ruby_version="`$CPP -I. -I"${srcdir}" -I"${srcdir}/include" conftest.c | sed '/^ruby_version=/!d;s/ //g'`"
     eval $ruby_version
+elif test -z "${ruby_version}"; then
+    AC_MSG_ERROR([No ruby version, No place for bundled libraries])
 else
     RUBY_LIB_VERSION="\"${ruby_version}\""
 fi
diff --git a/version.c b/version.c
index 282960d72f..6ba645315b 100644
--- a/version.c
+++ b/version.c
@@ -39,6 +39,8 @@
 #define RUBY_VENDOR_LIB RUBY_LIB_PREFIX"/vendor_ruby"
 #endif
 
+typedef char ruby_lib_version_string[(int)sizeof(RUBY_LIB_VERSION) - 2];
+
 #define RUBY_LIB                    RUBY_LIB_PREFIX  "/"RUBY_LIB_VERSION
 #define RUBY_SITE_LIB2              RUBY_SITE_LIB    "/"RUBY_LIB_VERSION
 #define RUBY_VENDOR_LIB2            RUBY_VENDOR_LIB  "/"RUBY_LIB_VERSION