diff --git a/ChangeLog b/ChangeLog
index 4b9a7be8ff..30525a47b9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Thu Mar 12 02:10:57 2009  Tanaka Akira  <akr@fsij.org>
+
+	* configure.in: strip spaces from ruby_version.
+	  Sun C 5.9 SunOS_i386 Build47_dlight 2007/05/22 generates
+	  `ruby_version= 1 "." 9 "." 1'.
+
 Thu Mar 12 01:18:09 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* dir.c (dir_seek): use long for seekdir().
diff --git a/configure.in b/configure.in
index a8ab5e1542..43ddf738e2 100644
--- a/configure.in
+++ b/configure.in
@@ -2246,7 +2246,7 @@ if test ${RUBY_LIB_VERSION_STYLE+set}; then
     echo '#include "version.h"'
     echo 'ruby_version=RUBY_LIB_VERSION'
     } > conftest.c
-    ruby_version="`$CPP -I"${srcdir}" conftest.c | grep '^ruby_version='`"
+    ruby_version="`$CPP -I"${srcdir}" conftest.c | grep '^ruby_version=' | tr -d ' '`"
     eval $ruby_version
 else
     RUBY_LIB_VERSION="\"${ruby_version}\""