diff --git a/src/slic3r/GUI/Preset.cpp b/src/slic3r/GUI/Preset.cpp
index f83afba9d..94761a52a 100644
--- a/src/slic3r/GUI/Preset.cpp
+++ b/src/slic3r/GUI/Preset.cpp
@@ -1372,7 +1372,7 @@ inline t_config_option_keys deep_diff(const ConfigBase &config_this, const Confi
         const ConfigOption *other_opt = config_other.option(opt_key);
         if (this_opt != nullptr && other_opt != nullptr && *this_opt != *other_opt)
         {
-            if (opt_key == "bed_shape" || opt_key == "compatible_prints" || opt_key == "compatible_printers") {
+            if (opt_key == "bed_shape" || opt_key == "thumbnails" || opt_key == "compatible_prints" || opt_key == "compatible_printers") {
                 diff.emplace_back(opt_key);
                 continue;
             }