diff --git a/src/slic3r/CMakeLists.txt b/src/slic3r/CMakeLists.txt
index e4dfd35ea5..4a0c316364 100644
--- a/src/slic3r/CMakeLists.txt
+++ b/src/slic3r/CMakeLists.txt
@@ -35,6 +35,10 @@ add_library(libslic3r_gui STATIC
     ${LIBDIR}/slic3r/GUI/GUI.hpp
     ${LIBDIR}/slic3r/GUI/GUI_ObjectParts.cpp
     ${LIBDIR}/slic3r/GUI/GUI_ObjectParts.hpp
+    ${LIBDIR}/slic3r/GUI/GUI_Preview.cpp
+    ${LIBDIR}/slic3r/GUI/GUI_Preview.hpp
+    ${LIBDIR}/slic3r/GUI/GUI_PreviewIface.cpp
+    ${LIBDIR}/slic3r/GUI/GUI_PreviewIface.hpp
     ${LIBDIR}/slic3r/GUI/LambdaObjectDialog.cpp
     ${LIBDIR}/slic3r/GUI/LambdaObjectDialog.hpp
     ${LIBDIR}/slic3r/GUI/Tab.cpp