diff --git a/vocoder/hifigan/inference.py b/vocoder/hifigan/inference.py
index 4405f41..edbcd38 100644
--- a/vocoder/hifigan/inference.py
+++ b/vocoder/hifigan/inference.py
@@ -19,7 +19,7 @@ def load_checkpoint(filepath, device):
     return checkpoint_dict
 
 
-def load_model(weights_fpath, config_fpath, verbose=True):
+def load_model(weights_fpath, config_fpath=None, verbose=True):
     global generator, _device, output_sample_rate
 
     if verbose: