diff --git a/src/x509.c b/src/x509.c
index a8cb9fd..207d682 100644
--- a/src/x509.c
+++ b/src/x509.c
@@ -304,11 +304,11 @@ int meth_extensions(lua_State* L)
       break;
 
     /* Push ret[oid] */
-    push_asn1_objname(L, extension->object, 1);
+    push_asn1_objname(L, X509_EXTENSION_get_object(extension), 1);
     push_subtable(L, -2);
 
     /* Set ret[oid].name = name */
-    push_asn1_objname(L, extension->object, 0);
+    push_asn1_objname(L, X509_EXTENSION_get_object(extension), 0);
     lua_setfield(L, -2, "name");
 
     n_general_names = sk_GENERAL_NAME_num(values);