diff --git a/cpp/pmtiles.hpp b/cpp/pmtiles.hpp
index 0b6bd91..e8dd71f 100644
--- a/cpp/pmtiles.hpp
+++ b/cpp/pmtiles.hpp
@@ -1,6 +1,7 @@
 #ifndef PMTILES_HPP
 #define PMTILES_HPP
 
+#include <cstdint>
 #include <string>
 #include <sstream>
 #include <vector>