diff --git a/include/stdex/compat.hpp b/include/stdex/compat.hpp
index d78f9f166..d4c60a1c0 100644
--- a/include/stdex/compat.hpp
+++ b/include/stdex/compat.hpp
@@ -9,6 +9,7 @@
 #ifdef _WIN32
 #include "windows.h"
 #include <sal.h>
+#include <tchar.h>
 #endif
 #include <type_traits>