Index: trunk/src/obj_pstk_op.c
===================================================================
--- trunk/src/obj_pstk_op.c	(revision 17093)
+++ trunk/src/obj_pstk_op.c	(revision 17094)
@@ -197,7 +197,10 @@
 	if (PCB_FLAG_TEST(PCB_FLAG_LOCK, ps))
 		return NULL;
 
-	rot += (double)ctx->rotate.angle;
+	if (ps->xmirror)
+		rot -= (double)ctx->rotate.angle;
+	else
+		rot += (double)ctx->rotate.angle;
 
 	if ((rot > 360.0) || (rot < -360.0))
 		rot = fmod(rot, 360.0);