diff --git a/src/slic3r/GUI/TextureLibrary.cpp b/src/slic3r/GUI/TextureLibrary.cpp
index 765ea680ff..69301b42d1 100644
--- a/src/slic3r/GUI/TextureLibrary.cpp
+++ b/src/slic3r/GUI/TextureLibrary.cpp
@@ -27,6 +27,7 @@
 #include <wx/mstream.h>
 
 #include "libslic3r/PNGReadWrite.hpp"
+#include "libslic3r/TextureDisplacement.hpp"
 #include "libslic3r/Utils.hpp"
 
 #include "libslic3r/AppConfig.hpp"
diff --git a/tests/libslic3r/test_texture_displacement.cpp b/tests/libslic3r/test_texture_displacement.cpp
index e6de116e24..3d60192cf4 100644
--- a/tests/libslic3r/test_texture_displacement.cpp
+++ b/tests/libslic3r/test_texture_displacement.cpp
@@ -28,6 +28,7 @@
 
 #include <algorithm>
 #include <array>
+#include <functional>
 #include <cmath>
 #include <fstream>
 #include <limits>