diff --git a/src/terraform_cmd.cpp b/src/terraform_cmd.cpp
index cc71f786a0..aa79ac9938 100644
--- a/src/terraform_cmd.cpp
+++ b/src/terraform_cmd.cpp
@@ -351,6 +351,8 @@ CommandCost CmdLevelLand(TileIndex tile, uint32 flags, uint32 p1, uint32 p2, con
 {
 	if (p1 >= MapSize()) return CMD_ERROR;
 
+	_terraform_err_tile = INVALID_TILE;
+
 	/* remember level height */
 	uint oldh = TileHeight(p1);