--- a/deps/LIEF/third-party/spdlog/include/spdlog/fmt/bundled/format.h
+++ b/deps/LIEF/third-party/spdlog/include/spdlog/fmt/bundled/format.h
@@ -1,3 +1,4 @@
+#include <cstdlib>
 /*
   Formatting library for C++