diff --git a/ChangeLog b/ChangeLog
index 596d524cba..e2e5660dcc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Tue Dec 25 17:32:04 2007  Akinori MUSHA  <knu@iDaemons.org>
+
+	* lib/mkmf.rb (create_makefile): Add a missing dependency on the
+	  target directory for each .rb file.  This will hopefully fix
+	  parallel make (-jN).  Tested on FreeBSD.
+
 Tue Dec 25 16:51:07 2007  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* enc/trans/japanese.c (rb_{from,to}_{SHIFT_JIS,EUC_JP}): inversed
diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index 2038f5f4cd..853f2f4da8 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -1511,7 +1511,7 @@ static:		$(STATIC_LIB)#{$extout ? " install-rb" : ""}
       for f in files
 	dest = "#{dir}/#{File.basename(f)}"
 	mfile.print("install-rb#{sfx}: #{dest}\n")
-	mfile.print("#{dest}: #{f}\n\t$(#{$extout ? 'COPY' : 'INSTALL_DATA'}) ")
+	mfile.print("#{dest}: #{f} #{dir}\n\t$(#{$extout ? 'COPY' : 'INSTALL_DATA'}) ")
 	sep = config_string('BUILD_FILE_SEPARATOR')
 	if sep
 	  f = f.gsub("/", sep)