diff --git a/src/libslic3r/SLAPrint.hpp b/src/libslic3r/SLAPrint.hpp
index ffa451b354..23c34ada19 100644
--- a/src/libslic3r/SLAPrint.hpp
+++ b/src/libslic3r/SLAPrint.hpp
@@ -2,7 +2,7 @@
 #define slic3r_SLAPrint_hpp_
 
 #include <mutex>
-
+#include "ClipperUtils.hpp"
 #include "PrintBase.hpp"
 #include "PrintExport.hpp"
 #include "Point.hpp"