diff --git a/tests/34-class-OK.asn1 b/tests/34-class-OK.asn1
index b2d4dff..48437fb 100644
--- a/tests/34-class-OK.asn1
+++ b/tests/34-class-OK.asn1
@@ -14,7 +14,7 @@
 	-- First CLASS
 
 	EXTENSION ::= CLASS {
-		&id	OBJECT IDENTIFIER UNIQUE,
+		&id [PRIVATE 0] OBJECT IDENTIFIER UNIQUE,
 		&ExtnType
 	} WITH SYNTAX {
 		SYNTAX		&ExtnType