diff --git a/src/blockarray.jl b/src/blockarray.jl
index 01300879..98ff70b5 100644
--- a/src/blockarray.jl
+++ b/src/blockarray.jl
@@ -310,7 +310,7 @@ convert(::Type{BlockArray{T}}, A::BlockArray{T}) where {T} = A
 convert(::Type{BlockArray}, A::BlockArray) = A
 
 BlockArray{T, N}(A::AbstractArray{T2, N}) where {T,T2,N} =
-    BlockArray(Array{T, N}(A), axes(A))
+    copyto!(BlockArray{T, N}(undef, axes(A)), A)
 BlockArray{T1}(A::AbstractArray{T2, N}) where {T1,T2,N} = BlockArray{T1, N}(A)
 BlockArray(A::AbstractArray{T, N}) where {T,N} = BlockArray{T, N}(A)
 
diff --git a/src/pseudo_blockarray.jl b/src/pseudo_blockarray.jl
index 5b43e36d..6277ece2 100644
--- a/src/pseudo_blockarray.jl
+++ b/src/pseudo_blockarray.jl
@@ -130,7 +130,7 @@ convert(::Type{AbstractArray}, A::PseudoBlockArray) = A
 
 
 PseudoBlockArray{T, N}(A::AbstractArray{T2, N}) where {T,T2,N} =
-    PseudoBlockArray(Array{T, N}(A), axes(A))
+    copyto!(PseudoBlockArray{T,N}(undef, axes(A)), A)
 PseudoBlockArray{T1}(A::AbstractArray{T2, N}) where {T1,T2,N} = PseudoBlockArray{T1, N}(A)
 PseudoBlockArray(A::AbstractArray{T, N}) where {T,N} = PseudoBlockArray{T, N}(A)