diff --git a/racket/src/foreign/foreign.c b/racket/src/foreign/foreign.c
index 4cc23636b5..9760243211 100644
--- a/racket/src/foreign/foreign.c
+++ b/racket/src/foreign/foreign.c
@@ -3212,7 +3212,7 @@ void do_ptr_finalizer(void *p, void *finalizer)
 
 THREAD_LOCAL_DECL(static Scheme_Hash_Table *ffi_lock_ht);
 
-#ifdef MZ_PRECISE_GC
+#if defined(MZ_PRECISE_GC) && defined(MZ_USE_PLACES)
 static Scheme_Object *make_vector_in_master(int count, Scheme_Object *val) {
   Scheme_Object *vec;
   void *original_gc;
diff --git a/racket/src/foreign/foreign.rktc b/racket/src/foreign/foreign.rktc
index dbd6145ed4..bf56eec10e 100755
--- a/racket/src/foreign/foreign.rktc
+++ b/racket/src/foreign/foreign.rktc
@@ -2377,7 +2377,7 @@ void do_ptr_finalizer(void *p, void *finalizer)
 
 THREAD_LOCAL_DECL(static Scheme_Hash_Table *ffi_lock_ht);
 
-#ifdef MZ_PRECISE_GC
+#if defined(MZ_PRECISE_GC) && defined(MZ_USE_PLACES)
 static Scheme_Object *make_vector_in_master(int count, Scheme_Object *val) {
   Scheme_Object *vec;
   void *original_gc;