diff --git a/game/server/enginecallback.h b/game/server/enginecallback.h
index fb4059fe..1fc305c2 100644
--- a/game/server/enginecallback.h
+++ b/game/server/enginecallback.h
@@ -22,8 +22,7 @@
 class IFileSystem;				// include FileSystem.h
 class IUniformRandomStream;		// include vstdlib/random.h
 class IEngineSound;				// include engine/IEngineSound.h
-class IVEngineServer;			
-class IVoiceServer;
+class IVEngineServer;
 class IStaticPropMgrServer;
 class ISpatialPartition;
 class IVModelInfo;
@@ -40,7 +39,6 @@ class CSteamAPIContext;
 class CSteamGameServerAPIContext;
 
 extern IVEngineServer			*engine;
-extern IVoiceServer				*g_pVoiceServer;
 extern IFileSystem				*filesystem;
 extern IStaticPropMgrServer		*staticpropmgr;
 extern ISpatialPartition		*partition;
diff --git a/game/server/gameinterface.cpp b/game/server/gameinterface.cpp
index da6ea568..93fcc909 100644
--- a/game/server/gameinterface.cpp
+++ b/game/server/gameinterface.cpp
@@ -23,7 +23,6 @@
 #include "ai_saverestore.h"
 #include "ai_networkmanager.h"
 #include "ndebugoverlay.h"
-#include "ivoiceserver.h"
 #include <stdarg.h>
 #include "movehelper_server.h"
 #include "networkstringtable_gamedll.h"
@@ -154,7 +153,6 @@ CUtlLinkedList<CMapEntityRef, unsigned short> g_MapEntityRefs;
 
 // Engine interfaces.
 IVEngineServer	*engine = NULL;
-IVoiceServer	*g_pVoiceServer = NULL;
 #if !defined(_STATIC_LINKED)
 IFileSystem		*filesystem = NULL;
 #else
@@ -655,8 +653,6 @@ bool CServerGameDLL::DLLInit( CreateInterfaceFn appSystemFactory,
 	// init each (seperated for ease of debugging)
 	if ( (engine = (IVEngineServer*)appSystemFactory(INTERFACEVERSION_VENGINESERVER, NULL)) == NULL )
 		return false;
-	if ( (g_pVoiceServer = (IVoiceServer*)appSystemFactory(INTERFACEVERSION_VOICESERVER, NULL)) == NULL )
-		return false;
 	if ( (networkstringtable = (INetworkStringTableContainer *)appSystemFactory(INTERFACENAME_NETWORKSTRINGTABLESERVER,NULL)) == NULL )
 		return false;
 	if ( (staticpropmgr = (IStaticPropMgrServer *)appSystemFactory(INTERFACEVERSION_STATICPROPMGR_SERVER,NULL)) == NULL )
diff --git a/public/eiface.h b/public/eiface.h
index 77afbf29..67c0d1bf 100644
--- a/public/eiface.h
+++ b/public/eiface.h
@@ -313,9 +313,12 @@ public:
 
 	virtual void unk101() = 0;
 	virtual void unk102() = 0;
-	virtual void unk103() = 0;
-	virtual void unk104() = 0;
-	virtual void unk105() = 0;
+	
+	// Use these to setup who can hear whose voice.
+	// Pass in client indices (which are their ent indices - 1).
+	virtual bool GetClientListening(CPlayerSlot iReceiver, CPlayerSlot iSender) = 0;
+	virtual bool SetClientListening(CPlayerSlot iReceiver, CPlayerSlot iSender, bool bListen) = 0;
+	virtual bool SetClientProximity(CPlayerSlot iReceiver, CPlayerSlot iSender, bool bUseProximity) = 0;
 	virtual void unk106() = 0;
 	virtual void unk107() = 0;
 
diff --git a/public/ivoiceserver.h b/public/ivoiceserver.h
deleted file mode 100644
index 4288fb36..00000000
--- a/public/ivoiceserver.h
+++ /dev/null
@@ -1,34 +0,0 @@
-//========= Copyright © 1996-2005, Valve Corporation, All rights reserved. ============//
-//
-// Purpose: This module defines the IVoiceServer interface, which is used by
-//			game code to control which clients are listening to which other
-//			clients' voice streams.
-//
-// $NoKeywords: $
-//=============================================================================//
-
-#ifndef IVOICESERVER_H
-#define IVOICESERVER_H
-
-
-#include "interface.h"
-
-
-#define INTERFACEVERSION_VOICESERVER	"VoiceServer002"
-
-
-abstract_class IVoiceServer
-{
-public:
-	virtual			~IVoiceServer()	{}
-
-	// Use these to setup who can hear whose voice.
-	// Pass in client indices (which are their ent indices - 1).
-	virtual bool	GetClientListening(int iReceiver, int iSender) = 0;
-	virtual bool	SetClientListening(int iReceiver, int iSender, bool bListen) = 0;
-	virtual bool	SetClientProximity(int iReceiver, int iSender, bool bUseProximity) = 0;
-};
-
-
-#endif
-