diff --git a/pldmd/instance_id.hpp b/pldmd/instance_id.hpp
index 70b284c..4f88c43 100644
--- a/pldmd/instance_id.hpp
+++ b/pldmd/instance_id.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <bitset>
+#include <cstdint>
 
 namespace pldm
 {