diff --git a/pkgs/racket-test-core/tests/racket/chaperone.rktl b/pkgs/racket-test-core/tests/racket/chaperone.rktl
index da446b6779..ed4f435002 100644
--- a/pkgs/racket-test-core/tests/racket/chaperone.rktl
+++ b/pkgs/racket-test-core/tests/racket/chaperone.rktl
@@ -3374,6 +3374,23 @@
   (test #t f (posn 0 p))
   (test #f f (posn 0 #f)))
 
+;; ----------------------------------------
+;; Check no-op impersonation of a parameter procedure
+
+(let ()
+  (define-values [impersonator-prop:x impersonator-x? impersonator-x]
+    (make-impersonator-property 'x))
+  
+  (define impersonated-current-pseudo-random-generator
+    (impersonate-procedure current-pseudo-random-generator #f 
+                           impersonator-prop:x #f))
+
+  (define gen (make-pseudo-random-generator))
+  (parameterize ([impersonated-current-pseudo-random-generator
+                  gen])
+    (test gen current-pseudo-random-generator)
+    (test gen impersonated-current-pseudo-random-generator)))
+
 ;; ----------------------------------------
 
 (report-errs)
diff --git a/racket/src/racket/src/fun.c b/racket/src/racket/src/fun.c
index 3acc0b71e8..6d68267368 100644
--- a/racket/src/racket/src/fun.c
+++ b/racket/src/racket/src/fun.c
@@ -3715,6 +3715,8 @@ Scheme_Object *scheme_apply_chaperone(Scheme_Object *o, int argc, Scheme_Object
   }
 
   if (SCHEME_CHAPERONE_FLAGS(px) & SCHEME_PROC_CHAPERONE_CALL_DIRECT) {
+    if (auto_val)
+      return argv[0];
     simple_call = SCHEME_VEC_ELS(px->redirects)[0];
     /* no redirection procedure */
     if (SCHEME_IMMUTABLEP(px->redirects)) {
diff --git a/racket/src/racket/src/thread.c b/racket/src/racket/src/thread.c
index c86608b738..bca98d2f50 100644
--- a/racket/src/racket/src/thread.c
+++ b/racket/src/racket/src/thread.c
@@ -7614,7 +7614,7 @@ Scheme_Object *scheme_extend_parameterization(int argc, Scheme_Object *argv[])
       key = argv[i + 1];
       if (SCHEME_CHAPERONEP(param)) {
         a[0] = key;
-        key = scheme_apply_chaperone(param, 1, a, scheme_void, 0);
+        key = scheme_apply_chaperone(param, 1, a, scheme_void, 0x3);
         param = SCHEME_CHAPERONE_VAL(param);
       }
       a[0] = key;