Index: layer_grp.c
===================================================================
--- layer_grp.c	(revision 29692)
+++ layer_grp.c	(revision 29693)
@@ -163,7 +163,7 @@
 		return -1;
 
 	inhibit_notify++;
-	if (auto_substrate && (og->ltype & PCB_LYT_COPPER)&& !(og->ltype & PCB_LYT_BOTTOM)) {
+	if (auto_substrate && (og->ltype & PCB_LYT_COPPER) && !(og->ltype & PCB_LYT_BOTTOM)) {
 		ng = pcb_layergrp_insert_after(pcb, gid);
 		make_substrate(pcb, ng);
 		after = ng - pcb->LayerGroups.grp;