diff --git a/vnpy/api/oes/vnoes/include/autocxxpy/callback_wrapper.hpp b/vnpy/api/oes/vnoes/include/autocxxpy/callback_wrapper.hpp
index 1ac97966..02b87521 100644
--- a/vnpy/api/oes/vnoes/include/autocxxpy/callback_wrapper.hpp
+++ b/vnpy/api/oes/vnoes/include/autocxxpy/callback_wrapper.hpp
@@ -94,7 +94,7 @@ namespace autocxxpy
             return what();
         }
 
-		virtual char const* what() const override
+		virtual char const* what() const noexcept override
 		{
 			return _what.c_str();
 		}