diff --git a/src/sectors/irreps.jl b/src/sectors/irreps.jl
index 0eb3ad03..04d5fdf6 100644
--- a/src/sectors/irreps.jl
+++ b/src/sectors/irreps.jl
@@ -334,6 +334,7 @@ function Base.length(p::CU1ProdIterator)
         return 2
     end
 end
+Base.eltype(::Type{CU1ProdIterator}) = CU1Irrep
 
 ⊗(a::CU1Irrep, b::CU1Irrep) = CU1ProdIterator(a, b)
 
diff --git a/test/sectors.jl b/test/sectors.jl
index a0a70458..a0702552 100644
--- a/test/sectors.jl
+++ b/test/sectors.jl
@@ -19,6 +19,8 @@ println("------------------------------------")
             @constinferred Bsymbol(s...)
             @constinferred Fsymbol(s..., s...)
             it = @constinferred s[1] ⊗ s[2]
+            @test eltype(it) === I
+            @test collect(it) isa Array{I}
             @constinferred ⊗(s..., s...)
         end
         @testset "Sector $Istr: Value iterator" begin