diff --git a/src/fe_net.hpp.orig b/src/fe_net.hpp
index c089681e429..3fe6f6685e2 100644
--- a/src/fe_net.hpp.orig
+++ b/src/fe_net.hpp
@@ -27,6 +27,7 @@
 #include <thread>
 #include <deque>
 #include <queue>
+#include <string>
 
 class FeNetWorker;