diff --git a/src/audio/audio.cpp b/src/audio/audio.cpp
index eaeb0b7f7..2ba01dfb2 100644
--- a/src/audio/audio.cpp
+++ b/src/audio/audio.cpp
@@ -307,7 +307,9 @@ qreal Audio::outputVolume()
 }
 
 /**
-The volume must be between 0 and 1
+Set the master output volume.
+
+@param[in] volume   the master volume (between 0 and 1)
 */
 void Audio::setOutputVolume(qreal volume)
 {