diff --git a/ChangeLog b/ChangeLog
index abfe4783a4..8cf86b1bf1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Thu Aug 21 14:22:50 2008  Shugo Maeda  <shugo@ruby-lang.org>
+
+	* strftime.c: include ruby/config.h instead of ruby/ruby.h.
+
+	* common.mk: removed the old rule for missing/strftime.c.
+
 Thu Aug 21 09:29:01 2008  Shugo Maeda  <shugo@ruby-lang.org>
 
 	* strftime.c (rb_strftime): return "UTC" instead of "GMT".
diff --git a/common.mk b/common.mk
index 8f55681e1e..5b7eefdead 100644
--- a/common.mk
+++ b/common.mk
@@ -413,7 +413,6 @@ mkdir.$(OBJEXT): {$(VPATH)}mkdir.c
 strchr.$(OBJEXT): {$(VPATH)}strchr.c
 strdup.$(OBJEXT): {$(VPATH)}strdup.c
 strerror.$(OBJEXT): {$(VPATH)}strerror.c
-strftime.$(OBJEXT): {$(VPATH)}strftime.c
 strstr.$(OBJEXT): {$(VPATH)}strstr.c
 strtod.$(OBJEXT): {$(VPATH)}strtod.c
 strtol.$(OBJEXT): {$(VPATH)}strtol.c
diff --git a/strftime.c b/strftime.c
index 28c9527140..811173cd7b 100644
--- a/strftime.c
+++ b/strftime.c
@@ -45,7 +45,7 @@
  * January 1996
  */
 
-#include "ruby/ruby.h"
+#include "ruby/config.h"
 
 #ifndef GAWK
 #include <stdio.h>