diff --git a/src/common/cityhash.h b/src/common/cityhash.h
index 022d0f7cb..d74fc7639 100644
--- a/src/common/cityhash.h
+++ b/src/common/cityhash.h
@@ -61,6 +61,7 @@
 
 #pragma once
 
+#include <cstddef>
 #include "common/common_types.h"
 
 namespace Common {