diff --git a/src/tree_cmd.cpp b/src/tree_cmd.cpp
--- a/src/tree_cmd.cpp
+++ b/src/tree_cmd.cpp
@@ -386,7 +386,7 @@ CommandCost CmdPlantTree(TileIndex tile,
 						case CLEAR_FIELDS:
 						case CLEAR_ROCKS: {
 							CommandCost ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
-							if (CmdFailed(ret)) return ret;
+							if (ret.Failed()) return ret;
 							cost.AddCost(ret);
 							break;
 						}