diff --git a/src/libslic3r/GCode/Thumbnails.cpp b/src/libslic3r/GCode/Thumbnails.cpp
index 352cc8444b..43f2d4b2a6 100644
--- a/src/libslic3r/GCode/Thumbnails.cpp
+++ b/src/libslic3r/GCode/Thumbnails.cpp
@@ -1,10 +1,12 @@
 #include "Thumbnails.hpp"
 #include "../miniz_extension.hpp"
+#include "format.hpp"
 
 #include <qoi/qoi.h>
 #include <jpeglib.h>
 #include <jerror.h>
 #include <vector>
+#include <boost/algorithm/string.hpp>
 
 namespace Slic3r::GCodeThumbnails {
 
diff --git a/src/libslic3r/GCode/Thumbnails.hpp b/src/libslic3r/GCode/Thumbnails.hpp
index 3a6a6d69fb..38a939b74c 100644
--- a/src/libslic3r/GCode/Thumbnails.hpp
+++ b/src/libslic3r/GCode/Thumbnails.hpp
@@ -4,6 +4,7 @@
 #include "../Point.hpp"
 #include "../PrintConfig.hpp"
 #include "ThumbnailData.hpp"
+#include "../enum_bitmask.hpp"
 
 #include <vector>
 #include <memory>
diff --git a/src/libslic3r/PrintConfig.cpp b/src/libslic3r/PrintConfig.cpp
index 8669592f82..6b89595dae 100644
--- a/src/libslic3r/PrintConfig.cpp
+++ b/src/libslic3r/PrintConfig.cpp
@@ -2,6 +2,7 @@
 #include "ClipperUtils.hpp"
 #include "Config.hpp"
 #include "I18N.hpp"
+#include "format.hpp"
 
 #include "GCode/Thumbnails.hpp"
 #include <set>