diff --git a/src/App.h b/src/App.h
index f6aed6b..50852c4 100644
--- a/src/App.h
+++ b/src/App.h
@@ -46,6 +46,8 @@ namespace uWS {
         }
     };
 
+    static_assert(sizeof(struct us_socket_context_options_t) == sizeof(SocketContextOptions), "Mismatching uSockets/uWebSockets ABI");
+
 template <bool SSL>
 struct TemplatedApp {
 private: