diff --git a/ansi-tests/syntax.lsp b/ansi-tests/syntax.lsp
index 3ad09486f809c81050811cbfb383c0cf9af6db78..3cb8f49e06b9ce4652940bbaa62fc8e767778a8c 100644
--- a/ansi-tests/syntax.lsp
+++ b/ansi-tests/syntax.lsp
@@ -791,7 +791,7 @@
 
 ;;; Tests of #S
 
-(unless (find-class 'syntax-test-struct-1)
+(unless (find-class 'syntax-test-struct-1 nil)
   (defstruct syntax-test-struct-1
     a b c))