diff --git a/ChangeLog b/ChangeLog
index f31c473c6b..031e8c98da 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Jun  1 11:21:04 2001  WATANABE Hirofumi  <eban@ruby-lang.org>
+
+	* configure.in: use waitpid on mingw32.
+
 Thu May 31 13:30:25 2001  WATANABE Hirofumi  <eban@ruby-lang.org>
 
 	* mkconfig.rb, ext/configsub.rb: VERSION -> RUBY_VERSION.
diff --git a/configure.in b/configure.in
index df44716257..961a558fcb 100644
--- a/configure.in
+++ b/configure.in
@@ -189,7 +189,8 @@ mingw*)		LIBS="-lwsock32 -lmsvcrt $LIBS"
 		ac_cv_header_sys_resource_h=no
 		ac_cv_header_sys_select_h=no
 		ac_cv_header_sys_times_h=no
-		ac_cv_func_times=yes;;
+		ac_cv_func_times=yes
+		ac_cv_func_waitpid=yes;;
 os2_emx*)	LIBS="-lm $LIBS"
 		ac_cv_lib_dir_opendir=no;;
 msdosdjgpp*)	LIBS="-lm $LIBS"