diff --git a/ChangeLog b/ChangeLog
index c45ad99fe0..c4c53401ed 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Mon Apr 25 21:31:36 2011  Nobuhiro Iwamatsu  <iwamatsu@nigauri.org>
+
+	* ext/openssl/extconf.rb: Should check SSLv2_*method.
+	  openssl compiled with "no-ssl2" the extconf don't fail
+	  when running `make' having this compilation errors.
+	  Patched by Laurent Arnoud. fixes #4562, #4556
+
 Mon Apr 25 20:53:32 2011  Tajima, Akio <artonx@yahoo.co.jp>
 
 	* win32/win32.c (kill): accept 0 only sig is SIGINT #4596
diff --git a/ext/openssl/extconf.rb b/ext/openssl/extconf.rb
index b1f2d88dda..1bd5a0741c 100644
--- a/ext/openssl/extconf.rb
+++ b/ext/openssl/extconf.rb
@@ -100,6 +100,9 @@ have_func("OBJ_NAME_do_all_sorted")
 have_func("SSL_SESSION_get_id")
 have_func("SSL_SESSION_cmp")
 have_func("OPENSSL_cleanse")
+have_func("SSLv2_method")
+have_func("SSLv2_server_method")
+have_func("SSLv2_client_method")
 unless have_func("SSL_set_tlsext_host_name", ['openssl/ssl.h'])
   have_macro("SSL_set_tlsext_host_name", ['openssl/ssl.h']) && $defs.push("-DHAVE_SSL_SET_TLSEXT_HOST_NAME")
 end