Index: polyhelp.c
===================================================================
--- polyhelp.c	(revision 31004)
+++ polyhelp.c	(revision 31005)
@@ -453,7 +453,7 @@
 	else {
 		if (op != NULL) {
 			rnd_bool succ;
-			period = pcb_get_value(op, NULL, NULL, &succ);
+			period = rnd_get_value(op, NULL, NULL, &succ);
 			if (!succ) {
 				rnd_message(RND_MSG_ERROR, "Invalid spacing value - must be a coordinate\n");
 				return -1;