diff --git a/base/iterators.jl b/base/iterators.jl
index 1a9dd73de7d82..8cf92aac8ff40 100644
--- a/base/iterators.jl
+++ b/base/iterators.jl
@@ -1083,6 +1083,7 @@ iterate(::ProductIterator{Tuple{}}, state) = nothing
     done1 === true || return done1 # false or missing
     return _pisdone(tail(iters), tail(states)) # check tail
 end
+@inline isdone(::ProductIterator{Tuple{}}, states) = true
 @inline isdone(P::ProductIterator, states) = _pisdone(P.iterators, states)
 
 @inline _piterate() = ()
diff --git a/test/iterators.jl b/test/iterators.jl
index 56a178eca8ed9..9132c7b8a23a8 100644
--- a/test/iterators.jl
+++ b/test/iterators.jl
@@ -987,3 +987,11 @@ end
     @test !Base.isdone(gen)
     @test collect(gen) == ["foo"]
 end
+
+@testset "empty product iterators" begin
+    v = nothing
+    for (z,) in zip(Iterators.product())
+        v = z
+    end
+    @test v == ()
+end