diff --git a/src/indexing.jl b/src/indexing.jl
index 95956ea..432d9d3 100644
--- a/src/indexing.jl
+++ b/src/indexing.jl
@@ -1,6 +1,6 @@
 nodeselect(ns, i, I...) = ns[i][I...]
-nodeselect(ns::Tuple, i, I...) = i == 1 ? first(ns)[I...] : nodeselect(Base.tail(ns), i - 1, I...)
-nodeselect(ns::Tuple{}, i, I...) = throw(BoundsError(ns, i))
+nodeselect(ns::Tuple, i::Integer, I...) = i == 1 ? first(ns)[I...] : nodeselect(Base.tail(ns), i - 1, I...)
+nodeselect(ns::Tuple{}, i::Integer, I...) = throw(BoundsError(ns, i))
 nodechild(ns, i, j) = ns[i].nodes[j]
 
 function bisect_search(a, i)
diff --git a/test/tuple_nodes.jl b/test/tuple_nodes.jl
index a23d788..76e2d66 100644
--- a/test/tuple_nodes.jl
+++ b/test/tuple_nodes.jl
@@ -51,6 +51,10 @@ scenario = construct(Scenario, (deepcopy(community),))
 @inferred getindex(community, 4)
 @inferred getindex(scenario, 8)
 
+@test isempty(plant1.values) && isempty(scenario.values)
+@test plant1[CartesianIndex(2), 1, 1] == plant1[2, 1, 1] == 4.1
+@test scenario[CartesianIndex(1), 1, 1] === scenario[1, 1, 1]
+
 @test scenario[1] == 1.1
 @test scenario[2] == 2.1
 @test scenario[3] == 3.1