Index: file.c
===================================================================
--- file.c	(revision 20884)
+++ file.c	(revision 20885)
@@ -47,6 +47,7 @@
 #include "plug_io.h"
 #include "hid.h"
 #include "layer.h"
+#include "layer_grp.h"
 #include "move.h"
 #include "parse_common.h"
 #include "pcb-printf.h"