diff --git a/include/openssl/obj.h b/include/openssl/obj.h
index 7e24820..367cfdc 100644
--- a/include/openssl/obj.h
+++ b/include/openssl/obj.h
@@ -193,7 +193,9 @@
 
 typedef struct obj_name_st {
   int type;
+  int alias;
   const char *name;
+  const char *data;
 } OBJ_NAME;
 
 #define OBJ_NAME_TYPE_MD_METH 1