diff --git a/src/libslic3r/Format/STEP.cpp b/src/libslic3r/Format/STEP.cpp
index fbb3b00f1..f4169a1df 100644
--- a/src/libslic3r/Format/STEP.cpp
+++ b/src/libslic3r/Format/STEP.cpp
@@ -5,6 +5,7 @@
 #include "STEP.hpp"
 
 #include <string>
+#include <boost/nowide/cstdio.hpp>
 #include <boost/nowide/iostream.hpp>
 #include <boost/nowide/fstream.hpp>