diff --git a/src/include/common/util/string_util.h b/src/include/common/util/string_util.h
index 627183c3f..148e8843b 100644
--- a/src/include/common/util/string_util.h
+++ b/src/include/common/util/string_util.h
@@ -12,6 +12,7 @@
 
 #pragma once
 
+#include <cstdint>
 #include <string>
 #include <vector>
 
diff --git a/src/include/primer/orset.h b/src/include/primer/orset.h
index ff0445fe8..7173a7477 100644
--- a/src/include/primer/orset.h
+++ b/src/include/primer/orset.h
@@ -12,6 +12,7 @@
 
 #pragma once
 
+#include <cstdint>
 #include <string>
 #include <vector>