diff --git a/src/Batches/batch.jl b/src/Batches/batch.jl
index cbc21935..f1fbd812 100644
--- a/src/Batches/batch.jl
+++ b/src/Batches/batch.jl
@@ -6,9 +6,6 @@ end
 
 Batch(xs) = Batch(Storage(xs))
 
-convert{T,S}(::Type{Batch{T,S}},storage::S) =
-  Batch{T,S}(storage)
-
 # TODO: figure out how to express this as a generic convert
 function rebatch(xs)
   dims = ndims(xs)-1
@@ -35,9 +32,6 @@ end
 
 Seq(xs) = Seq(Storage(xs))
 
-convert{T,S}(::Type{Seq{T,S}},storage::S) =
-  Seq{T,S}(storage)
-
 BatchSeq{T<:Seq} = Batch{T}
 
 function rebatchseq(xs)
diff --git a/src/Batches/catmat.jl b/src/Batches/catmat.jl
index 6ce282e3..2c24f1c6 100644
--- a/src/Batches/catmat.jl
+++ b/src/Batches/catmat.jl
@@ -31,13 +31,12 @@ typename(b::Type{<:BatchLike}) =
        Juno.trim(collect(b)))
 end
 
+convert{T,S}(B::Type{<:BatchLike{T,S}},storage::S) = B(storage)
+
 struct Storage{T,S} <: BatchLike{T,S}
   data::S
 end
 
-convert{T,S}(::Type{Storage{T,S}},storage::S) =
-  Storage{T,S}(storage)
-
 allequal(xs) = all(x -> x == first(xs), xs)
 
 function (::Type{Storage{T,S}}){T,S}(xs, storage::S)