diff --git a/include/xlnt/cell/phonetic_run.hpp b/include/xlnt/cell/phonetic_run.hpp
index cbf62ea7..9f20384e 100644
--- a/include/xlnt/cell/phonetic_run.hpp
+++ b/include/xlnt/cell/phonetic_run.hpp
@@ -24,6 +24,7 @@
 #pragma once
 
 #include <string>
+#include <cstdint>
 
 #include <xlnt/xlnt_config.hpp>
 
