diff --git a/lsteamclient/unix_private.h b/lsteamclient/unix_private.h
index 40fdfa29..1697e4d2 100644
--- a/lsteamclient/unix_private.h
+++ b/lsteamclient/unix_private.h
@@ -21,7 +21,7 @@ extern "C"
 #endif /* __cplusplus */
 
 struct w_iface;
-extern void queue_vtable_callback( struct w_iface *w_iface, enum callback_type type, uint64_t arg0, uint64_t arg1, uint64_t arg2 );
+extern void queue_vtable_callback( struct w_iface *w_iface, enum callback_type type, uint64_t arg0, uint64_t arg1 );
 extern void queue_vtable_callback_0_server_responded( struct w_iface *w_iface, gameserveritem_t_105 *server );
 extern void queue_vtable_callback_0_add_player_to_list( struct w_iface *w_iface, const char *pchName, int nScore, float flTimePlayed );
 extern void queue_vtable_callback_0_rules_responded( struct w_iface *w_iface, const char *pchRule, const char *pchValue );
diff --git a/lsteamclient/unix_steam_networking_manual.cpp b/lsteamclient/unix_steam_networking_manual.cpp
index 61bfe3ed..adf4e8dc 100644
--- a/lsteamclient/unix_steam_networking_manual.cpp
+++ b/lsteamclient/unix_steam_networking_manual.cpp
@@ -647,17 +647,17 @@ struct SteamMatchmakingServerListResponse_099u : u_ISteamMatchmakingServerListRe
 
 void SteamMatchmakingServerListResponse_099u::ServerResponded( int32_t iServer )
 {
-    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_0_1, (intptr_t)iServer, 0, 0 );
+    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_0_1, (intptr_t)iServer, 0 );
 }
 
 void SteamMatchmakingServerListResponse_099u::ServerFailedToRespond( int32_t iServer )
 {
-    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_1_1, (intptr_t)iServer, 0, 0 );
+    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_1_1, (intptr_t)iServer, 0 );
 }
 
 void SteamMatchmakingServerListResponse_099u::RefreshComplete( uint32_t response )
 {
-    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_2_1, (intptr_t)response, 0, 0 );
+    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_2_1, (intptr_t)response, 0 );
     TRACE( "RefreshComplete this %p, w_iface %p.\n", this, this->w_iface );
 }
 
@@ -701,17 +701,17 @@ class callback_obj_tracker<SteamMatchmakingServerListResponse_106> SteamMatchmak
 
 void SteamMatchmakingServerListResponse_106::ServerResponded( void *hRequest, int32_t iServer )
 {
-    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_0_2, (intptr_t)hRequest, (intptr_t)iServer, 0 );
+    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_0_2, (intptr_t)hRequest, (intptr_t)iServer );
 }
 
 void SteamMatchmakingServerListResponse_106::ServerFailedToRespond( void *hRequest, int32_t iServer )
 {
-    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_1_2, (intptr_t)hRequest, (intptr_t)iServer, 0 );
+    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_1_2, (intptr_t)hRequest, (intptr_t)iServer );
 }
 
 void SteamMatchmakingServerListResponse_106::RefreshComplete( void *hRequest, uint32_t response )
 {
-    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_2_2, (intptr_t)hRequest, (intptr_t)response, 0 );
+    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_2_2, (intptr_t)hRequest, (intptr_t)response );
     TRACE( "RefreshComplete this %p, w_iface %p.\n", this, this->w_iface );
 }
 
@@ -744,7 +744,7 @@ void SteamMatchmakingPingResponse::ServerResponded( gameserveritem_t_105 *server
 
 void SteamMatchmakingPingResponse::ServerFailedToRespond(void)
 {
-    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_1_0, 0, 0, 0 );
+    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_1_0, 0, 0 );
     TRACE("Deleting this %p, w_iface %p.\n", this, this->w_iface);
     free_callback_obj(this);
 }
@@ -776,14 +776,14 @@ void SteamMatchmakingPlayersResponse::AddPlayerToList(const char *pchName, int n
 
 void SteamMatchmakingPlayersResponse::PlayersFailedToRespond(void)
 {
-    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_1_0, 0, 0, 0 );
+    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_1_0, 0, 0 );
     TRACE("Deleting this %p, w_iface %p.\n", this, this->w_iface);
     free_callback_obj(this);
 }
 
 void SteamMatchmakingPlayersResponse::PlayersRefreshComplete(void)
 {
-    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_2_0, 0, 0, 0 );
+    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_2_0, 0, 0 );
     TRACE("Deleting this %p, w_iface %p.\n", this, this->w_iface);
     free_callback_obj(this);
 }
@@ -815,14 +815,14 @@ void SteamMatchmakingRulesResponse::RulesResponded(const char *pchRule, const ch
 
 void SteamMatchmakingRulesResponse::RulesFailedToRespond(void)
 {
-    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_1_0, 0, 0, 0 );
+    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_1_0, 0, 0 );
     TRACE("Deleting this %p, w_iface %p.\n", this, this->w_iface);
     free_callback_obj(this);
 }
 
 void SteamMatchmakingRulesResponse::RulesRefreshComplete(void)
 {
-    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_2_0, 0, 0, 0 );
+    queue_vtable_callback( this->w_iface, CALL_IFACE_VTABLE_2_0, 0, 0 );
     TRACE("Deleting this %p, w_iface %p.\n", this, this->w_iface);
     free_callback_obj(this);
 }
diff --git a/lsteamclient/unixlib.cpp b/lsteamclient/unixlib.cpp
index 6b335a48..862c676c 100644
--- a/lsteamclient/unixlib.cpp
+++ b/lsteamclient/unixlib.cpp
@@ -43,7 +43,7 @@ static int callback_len_utow( int cb_id, int u_len )
     return find_first_callback_def_by_id( cb_id )->w_callback_len;
 }
 
-void queue_vtable_callback( struct w_iface *w_iface, enum callback_type type, uint64_t arg0, uint64_t arg1, uint64_t arg2 )
+void queue_vtable_callback( struct w_iface *w_iface, enum callback_type type, uint64_t arg0, uint64_t arg1 )
 {
     struct callback_entry *entry;
     uint32_t size = 0;
@@ -58,7 +58,6 @@ void queue_vtable_callback( struct w_iface *w_iface, enum callback_type type, ui
     entry->callback.call_iface_vtable.iface = w_iface;
     entry->callback.call_iface_vtable.arg0 = arg0;
     entry->callback.call_iface_vtable.arg1 = arg1;
-    entry->callback.call_iface_vtable.arg2 = arg2;
 
     pthread_mutex_lock( &callbacks_lock );
     list_add_tail( &callbacks, &entry->entry );
diff --git a/lsteamclient/unixlib.h b/lsteamclient/unixlib.h
index 5a1213ba..cab3fefb 100644
--- a/lsteamclient/unixlib.h
+++ b/lsteamclient/unixlib.h
@@ -89,7 +89,6 @@ struct callback
             struct w_iface *iface;
             uint64_t arg0;
             uint64_t arg1;
-            uint64_t arg2;
         } call_iface_vtable;
 
         struct