diff --git a/src/libslic3r/SLA/SLAAutoSupports.cpp b/src/libslic3r/SLA/SLAAutoSupports.cpp
index 21d54e518..5a7ce6aab 100644
--- a/src/libslic3r/SLA/SLAAutoSupports.cpp
+++ b/src/libslic3r/SLA/SLAAutoSupports.cpp
@@ -6,6 +6,7 @@
 #include "ExPolygon.hpp"
 #include "SVG.hpp"
 #include "Point.hpp"
+#include "ClipperUtils.hpp"
 
 #include <iostream>
 #include <random>