1 files changed, 3 insertions, 0 deletions
diff --git a/clox/src/vm.h b/clox/src/vm.h
index 08706a3..61fe45a 100644
--- a/clox/src/vm.h
+++ b/clox/src/vm.h
@@ -25,6 +25,9 @@ typedef struct {
   Table strings;
   ObjUpvalue *openUpvalues;
   Obj *objects;
+  int grayCount;
+  int grayCapacity;
+  Obj **grayStack;
 } VM;
 
 typedef enum {