diff --git a/src/racket/src/mzmark_place.inc b/src/racket/src/mzmark_place.inc
index 1817b418ce..259ec371c0 100644
--- a/src/racket/src/mzmark_place.inc
+++ b/src/racket/src/mzmark_place.inc
@@ -35,6 +35,7 @@ static int place_val_SIZE(void *p, struct NewGC *gc) {
 static int place_val_MARK(void *p, struct NewGC *gc) {
   Scheme_Place *pr = (Scheme_Place *)p;
   gcMARK2(pr->channel, gc);
+  gcMARK2(pr->mref, gc);
 
   return
   gcBYTES_TO_WORDS(sizeof(Scheme_Place));
@@ -43,6 +44,7 @@ static int place_val_MARK(void *p, struct NewGC *gc) {
 static int place_val_FIXUP(void *p, struct NewGC *gc) {
   Scheme_Place *pr = (Scheme_Place *)p;
   gcFIXUP2(pr->channel, gc);
+  gcFIXUP2(pr->mref, gc);
 
   return
   gcBYTES_TO_WORDS(sizeof(Scheme_Place));
diff --git a/src/racket/src/mzmarksrc.c b/src/racket/src/mzmarksrc.c
index fea9e597ef..b0237724bb 100644
--- a/src/racket/src/mzmarksrc.c
+++ b/src/racket/src/mzmarksrc.c
@@ -1449,6 +1449,7 @@ place_val {
  mark:
   Scheme_Place *pr = (Scheme_Place *)p;
   gcMARK2(pr->channel, gc);
+  gcMARK2(pr->mref, gc);
 
  size:
   gcBYTES_TO_WORDS(sizeof(Scheme_Place));