diff --git a/mcrouter/lib/carbon/ExternalCarbonConnectionStats.h b/mcrouter/lib/carbon/ExternalCarbonConnectionStats.h
index b5c394039..a27697e20 100644
--- a/mcrouter/lib/carbon/ExternalCarbonConnectionStats.h
+++ b/mcrouter/lib/carbon/ExternalCarbonConnectionStats.h
@@ -7,6 +7,9 @@
 
 #pragma once
 
+#include <stdint.h>
+#include <string>
+
 namespace carbon {
 
 struct ExternalCarbonConnectionStats {