diff --git a/basis/stack-checker/transforms/transforms-tests.factor b/basis/stack-checker/transforms/transforms-tests.factor
index 6ebbc5c015..e5d75de45a 100644
--- a/basis/stack-checker/transforms/transforms-tests.factor
+++ b/basis/stack-checker/transforms/transforms-tests.factor
@@ -43,7 +43,7 @@ C: <color> color
 [ bad-new-test ] must-fail
 
 ! Corner case if macro expansion calls 'infer', found by Doug
-DEFER: smart-combo ( quot -- )
+DEFER: smart-combo ! ( quot -- )
 
 \ smart-combo [ infer [ ] curry ] 1 define-transform
 
@@ -82,4 +82,4 @@ MACRO: curry-folding-test ( quot -- )
 
 MACRO: two-params ( a b -- c ) + 1quotation ;
 
-[ [ 3 two-params ] infer ] [ T{ unknown-macro-input f two-params } = ] must-fail-with
\ No newline at end of file
+[ [ 3 two-params ] infer ] [ T{ unknown-macro-input f two-params } = ] must-fail-with