diff --git a/xs/Build.PL b/xs/Build.PL
index b35862313..9478c9e95 100644
--- a/xs/Build.PL
+++ b/xs/Build.PL
@@ -36,6 +36,7 @@ my $build = Module::Build::WithXSpp->new(
         cstring
         cstdlib
         ostream
+		sstream
     )]
 );
 
diff --git a/xs/src/Config.hpp b/xs/src/Config.hpp
index 0e68437f4..60918add9 100644
--- a/xs/src/Config.hpp
+++ b/xs/src/Config.hpp
@@ -1,9 +1,7 @@
 #ifndef slic3r_Config_hpp_
 #define slic3r_Config_hpp_
 
-#include <myinit.h>
 #include <map>
-#include <sstream>
 #include <climits>
 #include <cstdio>
 #include <cstdlib>
@@ -11,6 +9,7 @@
 #include <stdexcept>
 #include <string>
 #include <vector>
+#include <myinit.h>
 #include "Point.hpp"
 
 namespace Slic3r {
diff --git a/xs/src/Point.cpp b/xs/src/Point.cpp
index 9b95c6fb8..8eb752fd6 100644
--- a/xs/src/Point.cpp
+++ b/xs/src/Point.cpp
@@ -1,7 +1,7 @@
-#include "Point.hpp"
-#include "Line.hpp"
 #include <cmath>
 #include <sstream>
+#include "Point.hpp"
+#include "Line.hpp"
 
 namespace Slic3r {
 
diff --git a/xs/src/myinit.h b/xs/src/myinit.h
index 14e25fd43..43ed407bb 100644
--- a/xs/src/myinit.h
+++ b/xs/src/myinit.h
@@ -6,6 +6,7 @@
 #undef seekdir
 #include <ostream>
 #include <iostream>
+#include <sstream>
 
 #ifdef SLIC3RXS
 extern "C" {