diff --git a/src/racket/src/eval.c b/src/racket/src/eval.c
index 34abd44f37..6190ebce05 100644
--- a/src/racket/src/eval.c
+++ b/src/racket/src/eval.c
@@ -164,6 +164,7 @@ THREAD_LOCAL_DECL(static Scheme_Object *quick_stx);
 THREAD_LOCAL_DECL(int scheme_continuation_application_count);
 THREAD_LOCAL_DECL(static int generate_lifts_count);
 THREAD_LOCAL_DECL(int scheme_overflow_count);
+THREAD_LOCAL_DECL(Scheme_Prefix *scheme_prefix_finalize);
 int scheme_get_overflow_count() { return scheme_overflow_count; }
 
 /* read-only globals */
diff --git a/src/racket/src/schpriv.h b/src/racket/src/schpriv.h
index 9f314421d2..56f962112b 100644
--- a/src/racket/src/schpriv.h
+++ b/src/racket/src/schpriv.h
@@ -106,6 +106,7 @@ THREAD_LOCAL_DECL(extern int scheme_current_place_id);
 THREAD_LOCAL_DECL(extern intptr_t scheme_total_gc_time);
 THREAD_LOCAL_DECL(extern int scheme_cont_capture_count);
 THREAD_LOCAL_DECL(extern int scheme_continuation_application_count);
+THREAD_LOCAL_DECL(extern struct Scheme_Prefix *scheme_prefix_finalize);
 
 int scheme_num_types(void);