diff --git a/racket/collects/syntax/parse/private/runtime.rkt b/racket/collects/syntax/parse/private/runtime.rkt
index e463388510..45f647e44d 100644
--- a/racket/collects/syntax/parse/private/runtime.rkt
+++ b/racket/collects/syntax/parse/private/runtime.rkt
@@ -1,6 +1,5 @@
 #lang racket/base
 (require racket/stxparam
-         unstable/syntax
          syntax/parse/private/residual ;; keep abs. path
          (for-syntax racket/base
                      racket/list
@@ -141,6 +140,10 @@ residual.rkt.
                   (define-syntax name (make-syntax-mapping 'depth (quote-syntax stmp)))
                   ...)))]))
 
+(define-syntax-rule (phase-of-enclosing-module)
+  (variable-reference->module-base-phase
+   (#%variable-reference)))
+
 ;; (check-literal id phase-level-expr ctx) -> void
 (define-syntax (check-literal stx)
   (syntax-case stx ()