Index: obj_pstk_proto.c
===================================================================
--- obj_pstk_proto.c	(revision 20434)
+++ obj_pstk_proto.c	(revision 20435)
@@ -1146,7 +1146,7 @@
 
 pcb_cardinal_t *pcb_pstk_proto_used_all(pcb_data_t *data, pcb_cardinal_t *len_out)
 {
-	pcb_cardinal_t len, n, *res;
+	pcb_cardinal_t len, *res;
 	pcb_pstk_t *ps;
 
 	len = data->ps_protos.used;
@@ -1161,6 +1161,18 @@
 			res[ps->proto]++;
 	}
 
+	/* routing styles may also reference to prototypes if we are on a board */
+	if (data->parent_type == PCB_PARENT_BOARD) {
+		pcb_board_t *pcb = data->parent.board;
+		int n;
+
+		for(n = 0; n < pcb->RouteStyle.used; n++) {
+			pcb_cardinal_t pid = pcb->RouteStyle.array[n].via_proto;
+			if ((pid >= 0) && (pid < len))
+				res[pid]++;
+		}
+	}
+
 	*len_out = len;
 	return res;
 }