diff --git a/test/TableGen/TemplateArgRename.td b/test/TableGen/TemplateArgRename.td
index b15f21b19d2..b940a56d03a 100644
--- a/test/TableGen/TemplateArgRename.td
+++ b/test/TableGen/TemplateArgRename.td
@@ -1,6 +1,7 @@
 // tblgen %s
 
 // Make sure there is no collision between XX and XX.
+def S;
 
 class Before<int XX>;
 class After : Before<4> {