diff --git a/gloo/types.h b/gloo/types.h
index 32d50a2be..6aa26d672 100644
--- a/gloo/types.h
+++ b/gloo/types.h
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <cstdint>
 #include <iostream>
 
 #ifdef __CUDA_ARCH__