diff --git a/ChangeLog b/ChangeLog
index 79cb793a9e..e86d9883ac 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sun Jan 23 05:24:42 2005  GOTOU Yuuzou  <gotoyuzo@notwork.org>
+
+	* ext/openssl/ossl_ocsp.c (ossl_ocspreq_to_der): should call
+	  GetOCSPReq at first.
+
 Sat Jan 22 22:59:08 2005  Masatoshi SEKI  <m_seki@mva.biglobe.ne.jp>
 
 	* lib/drb/ssl.rb (accept): rescue SSLError. [druby-ja:110]
diff --git a/ext/openssl/ossl_ocsp.c b/ext/openssl/ossl_ocsp.c
index f88f749941..b1e721c24c 100644
--- a/ext/openssl/ossl_ocsp.c
+++ b/ext/openssl/ossl_ocsp.c
@@ -261,11 +261,11 @@ ossl_ocspreq_to_der(VALUE self)
     unsigned char *p;
     long len;
 
+    GetOCSPReq(self, req);
     if((len = i2d_OCSP_REQUEST(req, NULL)) <= 0)
 	ossl_raise(eOCSPError, NULL);
     str = rb_str_new(0, len);
     p = RSTRING(str)->ptr;
-    GetOCSPReq(self, req);
     if(i2d_OCSP_REQUEST(req, &p) <= 0)
 	ossl_raise(eOCSPError, NULL);
     ossl_str_adjust(str, p);