diff --git a/src/linkgraph/linkgraphjob.cpp b/src/linkgraph/linkgraphjob.cpp
--- a/src/linkgraph/linkgraphjob.cpp
+++ b/src/linkgraph/linkgraphjob.cpp
@@ -37,7 +37,7 @@ LinkGraphJob::LinkGraphJob(const LinkGra
 		 * This is on purpose. */
 		link_graph(orig),
 		settings(_settings_game.linkgraph),
-		join_date(TimerGameCalendar::date + (_settings_game.linkgraph.recalc_time / SECONDS_PER_DAY)),
+		join_date(TimerGameCalendar::date + (_settings_game.linkgraph.recalc_time / CalendarTime::SECONDS_PER_DAY)),
 		job_completed(false),
 		job_aborted(false)
 {
@@ -131,14 +131,14 @@ LinkGraphJob::~LinkGraphJob()
 			if (st2 == nullptr || st2->goods[this->Cargo()].link_graph != this->link_graph.index ||
 					st2->goods[this->Cargo()].node != dest_id ||
 					!(*lg)[node_id].HasEdgeTo(dest_id) ||
-					(*lg)[node_id][dest_id].LastUpdate() == INVALID_DATE) {
+					(*lg)[node_id][dest_id].LastUpdate() == CalendarTime::INVALID_DATE) {
 				/* Edge has been removed. Delete flows. */
 				StationIDStack erased = flows.DeleteFlows(to);
 				/* Delete old flows for source stations which have been deleted
 				 * from the new flows. This avoids flow cycles between old and
 				 * new flows. */
 				while (!erased.IsEmpty()) ge.flows.erase(erased.Pop());
-			} else if ((*lg)[node_id][dest_id].last_restricted_update == INVALID_DATE) {
+			} else if ((*lg)[node_id][dest_id].last_restricted_update == CalendarTime::INVALID_DATE) {
 				/* Edge is fully restricted. */
 				flows.RestrictFlows(to);
 			}