diff --git a/reactos/drivers/network/tcpip/tcpip/buffer.c b/reactos/drivers/network/tcpip/tcpip/buffer.c
index 6177845801c..e604c7bcacc 100644
--- a/reactos/drivers/network/tcpip/tcpip/buffer.c
+++ b/reactos/drivers/network/tcpip/tcpip/buffer.c
@@ -238,7 +238,7 @@ UINT CopyPacketToBufferChain(
         return 0;
 
     /* Skip SrcOffset bytes in the source packet */
-    NdisGetFirstBufferFromPacket(SrcPacket, &SrcBuffer, &SrcData, &SrcSize, &Total);
+    NdisGetFirstBufferFromPacket(SrcPacket, &SrcBuffer, (PVOID)&SrcData, &SrcSize, &Total);
     if (SkipToOffset(SrcBuffer, SrcOffset, &SrcData, &SrcSize) == -1)
         return 0;
 
diff --git a/reactos/drivers/network/tcpip/tcpip/dispatch.c b/reactos/drivers/network/tcpip/tcpip/dispatch.c
index 34063c2f806..25597acb0d0 100644
--- a/reactos/drivers/network/tcpip/tcpip/dispatch.c
+++ b/reactos/drivers/network/tcpip/tcpip/dispatch.c
@@ -881,7 +881,7 @@ NTSTATUS DispTdiReceiveDatagram(
 
   if (NT_SUCCESS(Status))
     {
-	PCHAR DataBuffer;
+	PVOID DataBuffer;
 	UINT BufferSize;
 
 	NdisQueryBuffer( (PNDIS_BUFFER)Irp->MdlAddress,
@@ -961,7 +961,7 @@ NTSTATUS DispTdiSend(
   TI_DbgPrint(MID_TRACE,("TCPIP<<< Got an MDL: %x\n", Irp->MdlAddress));
   if (NT_SUCCESS(Status))
     {
-	PCHAR Data;
+	PVOID Data;
 	UINT Len;
 
 	NdisQueryBuffer( Irp->MdlAddress, &Data, &Len );
@@ -1033,7 +1033,7 @@ NTSTATUS DispTdiSendDatagram(
         (PDRIVER_CANCEL)DispCancelRequest);
 
     if (NT_SUCCESS(Status)) {
-	PCHAR DataBuffer;
+	PVOID DataBuffer;
 	UINT BufferSize;
 
 	TI_DbgPrint(MID_TRACE,("About to query buffer %x\n", Irp->MdlAddress));