diff --git a/miniaudio.h b/miniaudio.h
index 0dba7c5f..4f646a2a 100644
--- a/miniaudio.h
+++ b/miniaudio.h
@@ -3622,7 +3622,7 @@ with the `ma_waveform` API. Example:
 
     ...
 
-    ma_waveform_read_pcm_frames(&waveform, pOutput, frameCount);
+    ma_waveform_read_pcm_frames(&waveform, pOutput, frameCount, NULL);
     ```
 
 The amplitude, frequency, type, and sample rate can be changed dynamically with