diff --git a/include/SDL_audio.h b/include/SDL_audio.h
index 8e2143e711..5f5d681865 100644
--- a/include/SDL_audio.h
+++ b/include/SDL_audio.h
@@ -1170,8 +1170,9 @@ extern DECLSPEC void SDLCALL SDL_MixAudio(Uint8 * dst, const Uint8 * src,
  * \param format the SDL_AudioFormat structure representing the desired audio
  *               format
  * \param len the length of the audio buffer in bytes
- * \param volume ranges from 0 - 128, and should be set to SDL_MIX_MAXVOLUME
- *               for full audio volume
+ * \param volume ranges from -128 - ∞ (at -128, the volume is at 0%, at 0 -
+ *               100% and the higher the number, the bigger the %), and should
+ *               be set to SDL_MIX_MAXVOLUME for full audio volume
  *
  * \since This function is available since SDL 2.0.0.
  */