diff --git a/scripting/SoundManager.sp b/scripting/SoundManager.sp
index 9a84cad..ed14838 100644
--- a/scripting/SoundManager.sp
+++ b/scripting/SoundManager.sp
@@ -288,7 +288,7 @@ void HookAcceptInput(Handle hGameData)
 	DHookAddParam(gH_AcceptInput, HookParamType_CharPtr);
 	DHookAddParam(gH_AcceptInput, HookParamType_CBaseEntity);
 	DHookAddParam(gH_AcceptInput, HookParamType_CBaseEntity);
-	DHookAddParam(gH_AcceptInput, HookParamType_Object, 20);
+	DHookAddParam(gH_AcceptInput, HookParamType_Object, 20, DHookPass_ByVal|DHookPass_ODTOR|DHookPass_OCTOR|DHookPass_OASSIGNOP);
 	DHookAddParam(gH_AcceptInput, HookParamType_Int);
 }
 
@@ -633,4 +633,4 @@ void CheckShotgunShotHook()
 bool IsValidClient(int client)
 {
 	return (client >= 1 && client <= MaxClients && IsClientConnected(client) && IsClientInGame(client) && !IsClientSourceTV(client));
-}
\ No newline at end of file
+}