diff --git a/src/setters.jl b/src/setters.jl
index b1214c290..e549ffb3b 100644
--- a/src/setters.jl
+++ b/src/setters.jl
@@ -21,6 +21,9 @@ julia> set(1, nullsetter, 2)
 """
 const nullsetter = NullSetter()
 
+Base.show(io::IO, ::NullSetter) = print(io, "nullsetter")
+# TODO: handle prefix
+
 """
     ToField(f) :: Setter
 
diff --git a/test/test_prettylens.jl b/test/test_prettylens.jl
index a5622cb50..48c6293f2 100644
--- a/test/test_prettylens.jl
+++ b/test/test_prettylens.jl
@@ -15,6 +15,7 @@ include("preamble.jl")
         ));
          context = :compact => true,
     ) == "◻.a∘〈last(◻),◻[:c].d∘(←exp|log→)〉"
+    @test prettylens(nullsetter) == "nullsetter"
 end
 
 end  # module
diff --git a/test/test_setters.jl b/test/test_setters.jl
index 5b199b6e8..744142c89 100644
--- a/test/test_setters.jl
+++ b/test/test_setters.jl
@@ -4,6 +4,7 @@ include("preamble.jl")
 
 @testset "nullsetter" begin
     @test set(1, nullsetter, 2) === 1
+    @test string(nullsetter) === "nullsetter"
 end
 
 @testset "ToField" begin