diff --git a/src/slic3r.cpp b/src/slic3r.cpp
index bced1a123..ef8e8c5e7 100644
--- a/src/slic3r.cpp
+++ b/src/slic3r.cpp
@@ -56,7 +56,7 @@ int CLI::run(int argc, char **argv) {
         if (cli_transform_config_def.has(opt_key)) this->transforms.push_back(opt_key);
     }
     // load config files supplied via --load
-    for (auto const &file : config.getStrings("load")) {
+    for (auto const &file : config.getStrings("load",{})) {
         try{
             if (!boost::filesystem::exists(file)) {
                 if (config.getBool("ignore_nonexistent_file", false)) {
@@ -314,10 +314,10 @@ int CLI::run(int argc, char **argv) {
                     boost::nowide::cout << msg << std::endl;
                 };
                 print.apply_config(this->print_config);
-                print.arrange = !this->config.getBool("dont_arrange");
+                print.arrange = !this->config.getBool("dont_arrange",false);
                 print.center = !this->config.has("center")
                     && !this->config.has("align_xy")
-                    && !this->config.getBool("dont_arrange");
+                    && !this->config.getBool("dont_arrange",false);
                 Slic3r::Log::error("CLI") << "Arrange: " << print.arrange<< ", center: " << print.center << std::endl;
                 print.set_model(model);
                 
@@ -435,7 +435,7 @@ CLI::output_filepath(const Model &model, IO::ExportFormat format) const {
     const std::string filename = pp.process(filename_format);
     
     // use --output when available
-    std::string outfile{ this->config.getString("output") };
+    std::string outfile{ this->config.getString("output","") };
     if (!outfile.empty()) {
         // if we were supplied a directory, use it and append our automatically generated filename
         const boost::filesystem::path out(outfile);