diff --git a/src/bench.h b/src/bench.h
index 2f71d89709..b8a1c2b461 100644
--- a/src/bench.h
+++ b/src/bench.h
@@ -7,6 +7,7 @@
 #ifndef SECP256K1_BENCH_H
 #define SECP256K1_BENCH_H
 
+#include <stdint.h>
 #include <stdio.h>
 #include <string.h>
 #include "sys/time.h"