Another stack.
diff --git a/crypto/x509/x509.h b/crypto/x509/x509.h
index 5c2894b..02f7b2f 100644
--- a/crypto/x509/x509.h
+++ b/crypto/x509/x509.h
@@ -174,7 +174,7 @@
 	int set; /* 1 for a set, 0 for a single item (which is wrong) */
 	union	{
 		char		*ptr;
-/* 1 */		STACK /* ASN1_TYPE */ *set;
+/* 1 */		STACK_OF(ASN1_TYPE) *set;
 /* 0 */		ASN1_TYPE	*single;
 		} value;
 	} X509_ATTRIBUTE;