Index: read.c
===================================================================
--- read.c	(revision 29715)
+++ read.c	(revision 29716)
@@ -1169,7 +1169,7 @@
 
 	/* we now flip the board about the X-axis, to invert the Y coords used by autotrax */
 	pcb_undo_freeze_add();
-	pcb_data_mirror(Ptr->Data, 0, PCB_TXM_COORD, 0);
+	pcb_data_mirror(Ptr->Data, 0, PCB_TXM_COORD, 0, 0);
 	pcb_undo_unfreeze_add();
 
 	/* still not sure if this is required: */