1 files changed, 1 insertions, 1 deletions

diff --git a/src/alloc.c b/src/alloc.c
index 8764591336e..ad716f543c3 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -6585,7 +6585,7 @@ mark_object (Lisp_Object arg)
         CHECK_ALLOCATED_AND_LIVE (live_cons_p);
         CONS_MARK (ptr);
         /* If the cdr is nil, avoid recursion for the car.  */
-        if (EQ (ptr->u.s.u.cdr, Qnil))
+        if (NILP (ptr->u.s.u.cdr))
           {
             obj = ptr->u.s.car;
             cdr_count = 0;