diff --git a/src/engine.cpp b/src/engine.cpp
index 818cd2d6e9..4a548b9677 100644
--- a/src/engine.cpp
+++ b/src/engine.cpp
@@ -141,6 +141,9 @@ void EngList_SortPartial(EngineList *el, EngList_SortTypeFunction compare, uint
 	qsort(&((*el)[begin]), num_items, sizeof(EngineID), compare);
 }
 
+
+/** Sets cached values in Player::num_vehicles and Group::num_vehicles
+ */
 void SetCachedEngineCounts()
 {
 	uint engines = GetEnginePoolSize();
diff --git a/src/openttd.cpp b/src/openttd.cpp
index f32d338d60..e79b166fcd 100644
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -2538,6 +2538,7 @@ void ReloadNewGRFData()
 	ResetVehiclePosHash();
 	AfterLoadVehicles(false);
 	StartupEngines();
+	SetCachedEngineCounts();
 	/* update station and waypoint graphics */
 	AfterLoadWaypoints();
 	AfterLoadStations();