Index: trunk/src_plugins/export_gerber/gerber.c
===================================================================
--- trunk/src_plugins/export_gerber/gerber.c	(revision 27766)
+++ trunk/src_plugins/export_gerber/gerber.c	(revision 27767)
@@ -590,6 +590,8 @@
 	pagecount = 1;
 	reset_apertures();
 
+	xform.no_slot_in_nonmech = 1;
+
 	lastgroup = -1;
 	layer_list_idx = 0;
 	finding_apertures = 1;