--- a/src/upmpdutils.hxx
+++ b/src/upmpdutils.hxx
@@ -17,6 +17,7 @@
#ifndef _UPMPDUTILS_H_X_INCLUDED_
#define _UPMPDUTILS_H_X_INCLUDED_
+#include <cstdint>
#include <string>
#include <unordered_map>
#include <vector>