diff --git a/src/dock_gui.cpp b/src/dock_gui.cpp
--- a/src/dock_gui.cpp
+++ b/src/dock_gui.cpp
@@ -250,7 +250,7 @@ static void BuildDockStationWndProc(Wind
 			SetTileSelectSize(1, 1);
 		}
 
-		DrawStationCoverageAreaText(4, 50, (uint)-1, rad);
+		DrawStationCoverageAreaText(4, 50, SCT_ALL, rad);
 		break;
 	}