diff --git a/src/python_run/piper/__init__.py b/src/python_run/piper/__init__.py
index e14d2c9..8c521ed 100644
--- a/src/python_run/piper/__init__.py
+++ b/src/python_run/piper/__init__.py
@@ -87,7 +87,7 @@ class Piper:
             dtype=np.float32,
         )
 
-        if (self.config.num_speakers > 1) and (speaker_id is not None):
+        if (self.config.num_speakers > 1) and (speaker_id is None):
             # Default speaker
             speaker_id = 0