diff --git a/src/extensions.jl b/src/extensions.jl
index da75d19..deb7bfc 100644
--- a/src/extensions.jl
+++ b/src/extensions.jl
@@ -1,4 +1,5 @@
 lower(x::Dict{Symbol}) = BSONDict(x)
+lower(x::BSONDict) = BSONDict(x)
 
 # Basic Types
 
diff --git a/test/runtests.jl b/test/runtests.jl
index d5d6c41..04c452f 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -41,6 +41,7 @@ end
   @test roundtrip_equal(fill(S(), (1,3)))
   @test roundtrip_equal(Set([1,2,3]))
   @test roundtrip_equal(Dict("a"=>1))
+  @test roundtrip_equal(Dict(:a => 1, :b => [1, 2]))
   @test roundtrip_equal(T(()))
 end