diff --git a/src/aura_engine/core/channels.py b/src/aura_engine/core/channels.py
index 3991e18c782d923b74d9a53e2f2183872047dd72..a60ddfd7150e92edf4bff5edc581690db1b3402b 100644
--- a/src/aura_engine/core/channels.py
+++ b/src/aura_engine/core/channels.py
@@ -235,6 +235,7 @@ class GenericChannel:
         Perform a fade-in for the given channel.
 
         Args:
+            volume (int): Volume from -1 to 100, where -1 indicates an error
             instant(bool): If true the fade instantly jumps to target volume
 
         Returns: