diff --git a/drivers/md/bcache/extents.c b/drivers/md/bcache/extents.c
index c3ead586dc274d35124689b03572b4f740719a57..416d1a3e028e03a34a9d03e31b9e6fa583c9b357 100644
--- a/drivers/md/bcache/extents.c
+++ b/drivers/md/bcache/extents.c
@@ -194,7 +194,7 @@ static bool btree_ptr_bad_expensive(struct btree *b, const struct bkey *k)
 	mutex_unlock(&b->c->bucket_lock);
 	bch_extent_to_text(buf, sizeof(buf), k);
 	btree_bug(b,
-"inconsistent btree pointer %s: bucket %li pin %i prio %i gen %i last_gc %i mark %llu gc_gen %i",
+"inconsistent btree pointer %s: bucket %zi pin %i prio %i gen %i last_gc %i mark %llu gc_gen %i",
 		  buf, PTR_BUCKET_NR(b->c, k, i), atomic_read(&g->pin),
 		  g->prio, g->gen, g->last_gc, GC_MARK(g), g->gc_gen);
 	return true;