diff --git a/src/libslic3r/Support/SupportCommon.cpp b/src/libslic3r/Support/SupportCommon.cpp
index f76ebaa0ed..20e8558dcc 100644
--- a/src/libslic3r/Support/SupportCommon.cpp
+++ b/src/libslic3r/Support/SupportCommon.cpp
@@ -1,4 +1,5 @@
 #include "../ClipperUtils.hpp"
+#include "../ClipperZUtils.hpp"
 #include "../ExtrusionEntityCollection.hpp"
 #include "../Layer.hpp"
 #include "../Print.hpp"
diff --git a/src/libslic3r/Support/SupportLayer.hpp b/src/libslic3r/Support/SupportLayer.hpp
index 82265881c7..155de70ce6 100644
--- a/src/libslic3r/Support/SupportLayer.hpp
+++ b/src/libslic3r/Support/SupportLayer.hpp
@@ -5,6 +5,8 @@
 #include <oneapi/tbb/spin_mutex.h>
 // for Slic3r::deque
 #include "../libslic3r.h"
+#include "ClipperUtils.hpp"
+#include "Polygon.hpp"
 
 namespace Slic3r::FFFSupport {