diff --git a/mace/examples/example.cc b/mace/examples/example.cc
index c54f3c504af23413488a648a0f08534bdf3f32d4..4569654e529b363da622758314a121290cce28a5 100644
--- a/mace/examples/example.cc
+++ b/mace/examples/example.cc
@@ -183,7 +183,7 @@ bool RunModel(const std::vector<std::string> &input_names,
                                   &engine);
   } else {
     create_engine_status =
-        CreateMaceEngineFromCode(model_name,
+        CreateMaceEngineFromCode(FLAGS_model_name,
                                  FLAGS_model_data_file,
                                  input_names,
                                  output_names,
diff --git a/tools/converter.py b/tools/converter.py
index ad135da872f137a6baf8154388bf34d3b2338c88..09a51a0ae9e9284359577364701a08b81ece69ab 100644
--- a/tools/converter.py
+++ b/tools/converter.py
@@ -279,7 +279,7 @@ def format_model_config(config_file_path):
     mace_check(len(model_names) > 0, ModuleName.YAML_CONFIG,
                "no model found in config file")
 
-    model_name_reg = re.compile(r'^[a-z0-9_]+$')
+    model_name_reg = re.compile(r'^[a-zA-Z0-9_]+$')
     for model_name in model_names:
         # check model_name legality
         mace_check(model_name not in CPP_KEYWORDS,