diff --git a/xs/src/libslic3r/Print.cpp b/xs/src/libslic3r/Print.cpp
index 425fd2ff8..58623c18c 100644
--- a/xs/src/libslic3r/Print.cpp
+++ b/xs/src/libslic3r/Print.cpp
@@ -9,6 +9,7 @@
 #include <algorithm>
 #include <boost/filesystem.hpp>
 #include <boost/lexical_cast.hpp>
+#include <fstream>
 
 namespace Slic3r {