diff --git a/ChangeLog b/ChangeLog
index 0a5338f9e7..fe11b062e5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sun Mar  7 16:22:26 2004  WATANABE Hirofumi  <eban@ruby-lang.org>
+
+	* Makefile.in (lex.c): use $? instead of $<.
+
 Sun Mar  7 05:34:42 2004  Minero Aoki  <aamine@loveruby.net>
 
 	* lib/net/http.rb: HTTPHeader keeps its header fields as an array.
diff --git a/Makefile.in b/Makefile.in
index 652ab28e5c..1f57a5a143 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -259,7 +259,7 @@ $(srcdir)/configure: $(srcdir)/configure.in
 
 lex.c: keywords
 	@-rm -f $@
-	gperf -p -j1 -i 1 -g -o -t -N rb_reserved_word -k1,3,$$ $< > $@ || \
+	gperf -p -j1 -i 1 -g -o -t -N rb_reserved_word -k1,3,$$ $? > $@ || \
 	cp "$(srcdir)/$@" .
 
 .y.c: