diff --git a/src/libslic3r/SLA/SLAAutoSupports.hpp b/src/libslic3r/SLA/SLAAutoSupports.hpp
index 637f0909c..40726fd0e 100644
--- a/src/libslic3r/SLA/SLAAutoSupports.hpp
+++ b/src/libslic3r/SLA/SLAAutoSupports.hpp
@@ -2,6 +2,7 @@
 #define SLAAUTOSUPPORTS_HPP_
 
 #include <libslic3r/Point.hpp>
+#include <libslic3r/TriangleMesh.hpp>
 
 
 namespace Slic3r {