diff --git a/ChangeLog b/ChangeLog
index 3b4629e0f4..1831845594 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Feb 22 21:35:33 2010  Tanaka Akira  <akr@fsij.org>
+
+	* ext/digest/sha2/sha2init.c: test OpenSSL more strictly.
+
 Mon Feb 22 11:52:30 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* lib/rubygems: update to 1.3.6.
diff --git a/ext/digest/sha2/sha2init.c b/ext/digest/sha2/sha2init.c
index fca33185d8..25ef6d2546 100644
--- a/ext/digest/sha2/sha2init.c
+++ b/ext/digest/sha2/sha2init.c
@@ -2,7 +2,7 @@
 /* $Id$ */
 
 #include "digest.h"
-#if defined(HAVE_OPENSSL_SHA_H)
+#if defined(HAVE_OPENSSL_SHA_H) && defined(HAVE_SHA256_TRANSFORM) && defined(HAVE_SHA512_TRANSFORM)
 #include "sha2ossl.h"
 #else
 #include "sha2.h"