diff --git a/ChangeLog b/ChangeLog
index 1f603bfd9e..62f3537252 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Jun 11 14:29:41 2001  WATANABE Hirofumi  <eban@ruby-lang.org>
+
+	* confgure.in: add RUBY_CANONICAL_BUILD.
+
 Sat Jun  9 16:31:03 2001  Usaku Nakamura  <usa@osb.att.ne.jp>
 
 	* ext/extmk.rb.in: Use -F and -T for mswin32 because cl.exe doesn't
diff --git a/configure.in b/configure.in
index 99831020a7..ec4d3d7f86 100644
--- a/configure.in
+++ b/configure.in
@@ -25,8 +25,11 @@ then
 (it is also a good idea to do 'make clean' before compiling))
 fi
 
+AC_DEFUN(RUBY_CANONICAL_BUILD, [AC_REQUIRE([AC_CANONICAL_BUILD])])
+
 AC_CANONICAL_HOST
 AC_CANONICAL_TARGET
+RUBY_CANONICAL_BUILD
 
 dnl checks for fat-binary
 fat_binary=no