diff --git a/include/stdex/exception.hpp b/include/stdex/exception.hpp
index 288245fec..88b1ef4f4 100644
--- a/include/stdex/exception.hpp
+++ b/include/stdex/exception.hpp
@@ -7,6 +7,7 @@
 
 #include "compat.hpp"
 #include <stdexcept>
+#include <string>
 
 namespace stdex
 {