diff --git a/src/slic3r/GUI/UnsavedChangesDialog.cpp b/src/slic3r/GUI/UnsavedChangesDialog.cpp
index 91f78f2c4b..d5dea0a645 100644
--- a/src/slic3r/GUI/UnsavedChangesDialog.cpp
+++ b/src/slic3r/GUI/UnsavedChangesDialog.cpp
@@ -1191,8 +1191,9 @@ static size_t get_id_from_opt_key(std::string opt_key)
 static wxString get_full_label(std::string opt_key, const DynamicPrintConfig& config)
 {
     opt_key = get_pure_opt_key(opt_key);
+    auto option = config.option(opt_key);
 
-    if (config.option(opt_key)->is_nil())
+    if (!option || option->is_nil())
         return _L("N/A");
 
     const ConfigOptionDef* opt = config.def()->get(opt_key);