diff --git a/TTS/tts/models/vits.py b/TTS/tts/models/vits.py
index 82a8f7a7..0f8e111a 100644
--- a/TTS/tts/models/vits.py
+++ b/TTS/tts/models/vits.py
@@ -206,6 +206,7 @@ def wav_to_mel(y, n_fft, num_mels, sample_rate, hop_length, win_length, fmin, fm
 
 @dataclass
 class VitsAudioConfig(Coqpit):
+    fft_size: int = 1024
     sample_rate: int = 22050
     win_length: int = 1024
     hop_length: int = 256