diff --git a/fs/pstore/blk.c b/fs/pstore/blk.c
index 5d1fbaffd66a1e16449d8bb964deb33a490b78f3..4ae0cfcd15f20bd10a8a62b40d324d721b1e90cb 100644
--- a/fs/pstore/blk.c
+++ b/fs/pstore/blk.c
@@ -309,7 +309,7 @@ static int __init __best_effort_init(void)
 	if (ret)
 		kfree(best_effort_dev);
 	else
-		pr_info("attached %s (%zu) (no dedicated panic_write!)\n",
+		pr_info("attached %s (%lu) (no dedicated panic_write!)\n",
 			blkdev, best_effort_dev->zone.total_size);
 
 	return ret;