diff --git a/docs/voice/quickstart.md b/docs/voice/quickstart.md
index a9513f4..896ffe8 100644
--- a/docs/voice/quickstart.md
+++ b/docs/voice/quickstart.md
@@ -104,7 +104,7 @@ from agents.voice import AudioInput
 
 # For simplicity, we'll just create 3 seconds of silence
 # In reality, you'd get microphone data
-audio = np.zeros(24000 * 3, dtype=np.int16)
+buffer = np.zeros(24000 * 3, dtype=np.int16)
 audio_input = AudioInput(buffer=buffer)
 
 result = await pipeline.run(audio_input)