diff --git a/libdevcore/FixedHash.h b/libdevcore/FixedHash.h
index 139c0d943..5257ed333 100644
--- a/libdevcore/FixedHash.h
+++ b/libdevcore/FixedHash.h
@@ -24,6 +24,7 @@
 #pragma once
 
 #include <array>
+#include <cstdint>
 #include <random>
 #include <algorithm>
 #include "CommonData.h"
diff --git a/libdevcrypto/Common.cpp b/libdevcrypto/Common.cpp
index e75623799..6ff29988a 100644
--- a/libdevcrypto/Common.cpp
+++ b/libdevcrypto/Common.cpp
@@ -22,6 +22,7 @@
 
 #include "Common.h"
 #include <random>
+#include <cstdint>
 #include <chrono>
 #include <thread>
 #include <mutex>