diff --git a/src/libslic3r/PrintConfig.hpp b/src/libslic3r/PrintConfig.hpp
index 75079ee716..b97168e84e 100644
--- a/src/libslic3r/PrintConfig.hpp
+++ b/src/libslic3r/PrintConfig.hpp
@@ -762,6 +762,8 @@ PRINT_CONFIG_CLASS_DERIVED_DEFINE(
     ((ConfigOptionInt,                standby_temperature_delta))
     ((ConfigOptionInts,               temperature))
     ((ConfigOptionInt,                threads))
+    ((ConfigOptionPoints,             thumbnails))
+    ((ConfigOptionEnum<GCodeThumbnailsFormat>,  thumbnails_format))
     ((ConfigOptionBools,              wipe))
     ((ConfigOptionBool,               wipe_tower))
     ((ConfigOptionFloat,              wipe_tower_x))