Index: act_layer.c
===================================================================
--- act_layer.c	(revision 31785)
+++ act_layer.c	(revision 31786)
@@ -48,7 +48,7 @@
 static const char pcb_acts_ReadGroup[] =
 	"ReadGroup(length)\n"
 	"ReadGroup(field, group, [init_invis|ltype|ltypestr|name|open|purpose|vis|length])\n"
-	"ReadGroup(layerid, idx)\n"
+	"ReadGroup(layerid, group, idx)\n"
 	;
 static const char pcb_acth_ReadGroup[] = "Length returns the number of groups on the current PCB. Field returns one of the fields of the group named in groupid. Layerid returns the integer layer ID (as interpreted within data) for the idxth layer of the group.";
 static fgw_error_t pcb_act_ReadGroup(fgw_arg_t *res, int argc, fgw_arg_t *argv)