diff --git a/ChangeLog b/ChangeLog
index 369a37b78f..4784bffadb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sat Mar 31 12:05:01 2012  Martin Bosslet  <Martin.Bosslet@googlemail.com>
+
+	* ext/openssl/ossl_x509cert.c: Fix doc typo.
+
 Sat Mar 31 10:13:24 2012  Sokolov Yura (funny-falcon)  <funny.falcon@gmail.com>
 
 	* st.c (st_foreach_check, st_foreach): remove ancient check.  This
diff --git a/ext/openssl/ossl_x509cert.c b/ext/openssl/ossl_x509cert.c
index 3093d60f1f..84cedc763a 100644
--- a/ext/openssl/ossl_x509cert.c
+++ b/ext/openssl/ossl_x509cert.c
@@ -490,7 +490,7 @@ ossl_x509_get_not_after(VALUE self)
 
 /*
  * call-seq:
- *    cert.not_before = time => time
+ *    cert.not_after = time => time
  */
 static VALUE
 ossl_x509_set_not_after(VALUE self, VALUE time)