diff --git a/reactos/drivers/network/tcpip/include/lock.h b/reactos/drivers/network/tcpip/include/lock.h
index b7cad5d720d..31ed91a8495 100644
--- a/reactos/drivers/network/tcpip/include/lock.h
+++ b/reactos/drivers/network/tcpip/include/lock.h
@@ -12,8 +12,5 @@ extern VOID TcpipInterlockedInsertTailList( PLIST_ENTRY ListHead,
 					    PKSPIN_LOCK Lock );
 extern VOID TcpipAcquireFastMutex( PFAST_MUTEX Mutex );
 extern VOID TcpipReleaseFastMutex( PFAST_MUTEX Mutex );
-extern VOID TcpipRecursiveMutexInit( PRECURSIVE_MUTEX RecMutex );
-extern VOID TcpipRecursiveMutexEnter( PRECURSIVE_MUTEX RecMutex );
-extern VOID TcpipRecursiveMutexLeave( PRECURSIVE_MUTEX RecMutex );
 
 #endif/*_LOCK_H*/