diff --git a/basis/stack-checker/known-words/known-words.factor b/basis/stack-checker/known-words/known-words.factor
index ad4cadb743..bce42f1456 100644
--- a/basis/stack-checker/known-words/known-words.factor
+++ b/basis/stack-checker/known-words/known-words.factor
@@ -611,9 +611,6 @@ M: object infer-call*
 \ <string> { integer integer } { string } define-primitive
 \ <string> make-flushable
 
-\ (string) { integer } { string } define-primitive
-\ (string) make-flushable
-
 \ array>quotation { array } { quotation } define-primitive
 \ array>quotation make-flushable