diff --git a/include/gzip/utils.hpp b/include/gzip/utils.hpp
index db123d1..f0514ff 100644
--- a/include/gzip/utils.hpp
+++ b/include/gzip/utils.hpp
@@ -1,3 +1,4 @@
+#include <cstdint>
 #include <cstdlib>
 
 namespace gzip {