diff --git a/racket/src/cs/rumble/hash.ss b/racket/src/cs/rumble/hash.ss
index b604132108..e377a8163b 100644
--- a/racket/src/cs/rumble/hash.ss
+++ b/racket/src/cs/rumble/hash.ss
@@ -166,7 +166,7 @@
    [(and (impersonator? ht)
          (intmap? (impersonator-val ht)))
     (impersonate-hash-set ht k v)]
-   [else (raise-argument-error 'hash-set! "(and/c hash? immutable?)" ht)]))
+   [else (raise-argument-error 'hash-set "(and/c hash? immutable?)" ht)]))
 
 (define (hash-remove ht k)
   (cond