diff --git a/src/NoBang/base.jl b/src/NoBang/base.jl
index a168ee48..68277279 100644
--- a/src/NoBang/base.jl
+++ b/src/NoBang/base.jl
@@ -31,6 +31,8 @@ _append(xs, ys) = append!(copy(xs), ys)
 _append(xs, ys::Tuple) = push(xs, ys...)
 _append(xs, ys::Pairs{Symbol, <:Any, <:Any, <:NamedTuple}) = push(xs, ys...)
 
+append(xs::AbstractVector, ys::AbstractVector) = vcat(xs, ys)
+
 append(xs::ImmutableContainer, ys) = push(xs, ys...)
 
 append(xs::AbstractString, ys::AbstractString) = string(xs, ys)
diff --git a/test/test_append.jl b/test/test_append.jl
index f942c0fe..e5fd2774 100644
--- a/test/test_append.jl
+++ b/test/test_append.jl
@@ -11,6 +11,8 @@ include("preamble.jl")
     @test append!!(ImmutableDict(:a=>1), ImmutableDict(:b=>2)) ==
         ImmutableDict(ImmutableDict(:a=>1), :b=>2)
     @test append!!("a", "b") === "ab"
+    @test append!!(SVector(0), [1])::Vector == [0, 1]
+    @test append!!([0], SVector(1))::Vector == [0, 1]
 end
 
 end  # module