index 0cf7910..54cb45e 100644
--- a/src/ccnr.h
+++ b/src/ccnr.h
@@ -23,6 +23,7 @@ THE SOFTWARE.
 #ifndef CCNR_H
 #define CCNR_H
 
+#include <cstdint>
 #include <string>
 #include <vector>
 #include "ccnr_mersenne.h"