diff --git a/src/include/robin_hood.h b/src/include/robin_hood.h
index b4e0fbc..405e67d 100644
--- a/src/include/robin_hood.h
+++ b/src/include/robin_hood.h
@@ -40,6 +40,7 @@
 
 #include <algorithm>
 #include <cstdlib>
+#include <cstdint>
 #include <cstring>
 #include <functional>
 #include <limits>