diff --git a/nano/lib/utility.cpp b/nano/lib/utility.cpp
index f33b21a811..d7ada0b4c9 100644
--- a/nano/lib/utility.cpp
+++ b/nano/lib/utility.cpp
@@ -5,6 +5,7 @@
 #include <boost/program_options.hpp>
 
 #include <cstddef>
+#include <fstream>
 #include <iostream>
 
 #ifdef _WIN32