diff --git a/gc.c b/gc.c
index dc35f77f34..4254922f78 100644
--- a/gc.c
+++ b/gc.c
@@ -945,7 +945,6 @@ struct heap_page {
     short slot_size;
     short total_slots;
     short free_slots;
-    short pinned_slots;
     short final_slots;
     struct {
         unsigned int before_sweep : 1;