diff --git a/xs/src/libslic3r/Format/3mf.cpp b/xs/src/libslic3r/Format/3mf.cpp
index e8c9cfb32..60ddf5d02 100644
--- a/xs/src/libslic3r/Format/3mf.cpp
+++ b/xs/src/libslic3r/Format/3mf.cpp
@@ -13,7 +13,7 @@
 #include <boost/nowide/fstream.hpp>
 
 #include <expat.h>
-#include <eigen/dense>
+#include <Eigen/Dense>
 #include <miniz/miniz_zip.h>
 
 const std::string MODEL_FOLDER = "3D/";