diff --git a/src/modules_core/abc/events/on_voice_state_update_abc.py b/src/modules_core/abc/events/on_voice_state_update_abc.py
index 266f962..60d586f 100644
--- a/src/modules_core/abc/events/on_voice_state_update_abc.py
+++ b/src/modules_core/abc/events/on_voice_state_update_abc.py
@@ -1,7 +1,11 @@
 from abc import ABC, abstractmethod
+import discord
 
 
 class OnVoiceStateUpdateABC(ABC):
 
     @abstractmethod
     def __init__(self): pass
+
+    @abstractmethod
+    async def on_voice_state_update(self, member: discord.Member, before: discord.VoiceState,after: discord.VoiceState): pass