diff --git a/gloo/types.h b/gloo/types.h
index df71d5422..8278c9f50 100644
--- a/gloo/types.h
+++ b/gloo/types.h
@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <cstdint>
 #include <iostream>
 
 #ifdef __CUDA_ARCH__