From 198cac911ef7c141075c719029720df4cab6d463 Mon Sep 17 00:00:00 2001
From: Daniel Lemire <daniel@lemire.me>
Date: Wed, 25 Jan 2023 22:35:57 -0500
Subject: [PATCH] Casting.

---
 tests/cpp_unit.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/cpp_unit.cpp b/tests/cpp_unit.cpp
index 1ed6c60b2..139249c4b 100644
--- a/tests/cpp_unit.cpp
+++ b/tests/cpp_unit.cpp
@@ -1870,7 +1870,7 @@ DEFINE_TEST(test_cpp_remove_run_compression) {
 bool test64Deserialize(const std::string& filename) {
     std::ifstream in(TEST_DATA_DIR + filename, std::ios::binary);
     std::vector<char> buf1(std::istreambuf_iterator<char>(in), {});
-    printf("Reading %lu bytes\n", buf1.size());
+    printf("Reading %lu bytes\n", (unsigned long)buf1.size());
     Roaring64Map roaring;
 #if ROARING_EXCEPTIONS
     try {