diff --git a/ChangeLog b/ChangeLog
index edbe6165ef..57bc8d6d9f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Nov  7 16:23:23 2005  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* ext/openssl/ossl.h: need to include winsock2.h before including
+	  windows.h by some openssl headers.
+
 Mon Nov  7 13:43:51 2005  Hidetoshi NAGAI  <nagai@ai.kyutech.ac.jp>
 
 	* ext/tk/stubs.c (_nativethread_consistency_check): use simpler 
diff --git a/ext/openssl/ossl.h b/ext/openssl/ossl.h
index f678ac1188..42578f7a75 100644
--- a/ext/openssl/ossl.h
+++ b/ext/openssl/ossl.h
@@ -31,6 +31,7 @@ extern "C" {
 #if defined(_WIN32)
 #  define OpenFile WINAPI_OpenFile
 #  define OSSL_NO_CONF_API 1
+#  include <winsock2.h>
 #endif
 #include <errno.h>
 #include <openssl/err.h>