diff --git a/src/terraform_cmd.cpp b/src/terraform_cmd.cpp
--- a/src/terraform_cmd.cpp
+++ b/src/terraform_cmd.cpp
@@ -422,6 +422,7 @@ CommandCost CmdLevelLand(TileIndex tile,
 
 	const Company *c = Company::GetIfValid(_current_company);
 	int limit = (c == NULL ? INT32_MAX : GB(c->terraform_limit, 16, 16));
+	if (limit == 0) return_cmd_error(STR_ERROR_TERRAFORM_LIMIT_REACHED);
 
 	TileArea ta(tile, p1);
 	TileIterator *iter = HasBit(p2, 0) ? (TileIterator *)new DiagonalTileIterator(tile, p1) : new OrthogonalTileIterator(ta);