diff --git a/src/sagotmx/tmx_struct.h b/src/sagotmx/tmx_struct.h
index 76d5b9b..9dc3a56 100644
--- a/src/sagotmx/tmx_struct.h
+++ b/src/sagotmx/tmx_struct.h
@@ -47,6 +47,7 @@ SOFTWARE.
 #include <string>
 #include <sstream>
 #include <cstring>
+#include <cstdint>
 #include <vector>
 #include <map>
 #include <zlib.h>