diff --git a/npf.c b/npf.c
--- a/npf.c
+++ b/npf.c
@@ -780,7 +780,7 @@ NPFFoundTargetData NPFRouteToDepotTrialE
 	 */
 	Queue depots;
 	int r;
-	NPFFoundTargetData best_result;
+	NPFFoundTargetData best_result = {(uint)-1, (uint)-1, INVALID_TRACKDIR, {INVALID_TILE, 0, {0, 0}}};
 	NPFFoundTargetData result;
 	NPFFindStationOrTileData target;
 	AyStarNode start;