diff --git a/Project.toml b/Project.toml
index cc18e35..9f18b9b 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "BlockBandedMatrices"
 uuid = "ffab5731-97b5-5995-9138-79e8c1846df0"
-version = "0.13.5"
+version = "0.13.6"
 
 [deps]
 ArrayLayouts = "4c555306-a7a7-4459-81d9-ec55ddd5c99a"
diff --git a/src/interfaceimpl.jl b/src/interfaceimpl.jl
index b47650a..39b5dee 100644
--- a/src/interfaceimpl.jl
+++ b/src/interfaceimpl.jl
@@ -57,8 +57,8 @@ function blockbandwidths(::AbstractBandedLayout, (a,b)::Tuple{AbstractBlockedUni
     end
 end
 
-function blockbandwidths(::AbstractBandedLayout, (a,b)::Tuple{BlockedOneTo{<:Any,<:AbstractRange}, BlockedOneTo{<:Any,<:AbstractRange}}, A)
-    a ≠ b && return blockbandwidths(UnknownLayout(), (a,b), A) # can implement same step but not done yet
+function blockbandwidths(::AbstractBandedLayout, (a,b)::Tuple{AbstractBlockedUnitRange{<:Any,<:AbstractRange}, AbstractBlockedUnitRange{<:Any,<:AbstractRange}}, A)
+    step(a.lasts) ≠ step(b.lasts) && return blockbandwidths(UnknownLayout(), (a,b), A) # can implement same step but not done yet
     l,u = bandwidths(A)
     s = step(a.lasts) # normal blocksize 
     (l+s-1) ÷ s, (u+s-1) ÷ s
@@ -85,9 +85,9 @@ sublayout(::DiagonalLayout{L}, inds::Type{<:NTuple{2,BS}}) where {L,BS<:BlockSli
 
 ##
 # special for unitblocks
-blockbandwidths(A::BlockedMatrix{<:Any,<:Any,<:NTuple{2,BlockedOneTo{Int,<:AbstractUnitRange{Int}}}}) = bandwidths(A.blocks)
-blockbandwidths(A::BlockedMatrix{<:Any,<:Diagonal,<:NTuple{2,BlockedOneTo{Int,<:AbstractUnitRange{Int}}}}) = bandwidths(A.blocks)
-subblockbandwidths(A::BlockedMatrix{<:Any,<:Any,<:NTuple{2,BlockedOneTo{Int,<:AbstractUnitRange{Int}}}}) = (0,0)
+blockbandwidths(A::BlockedMatrix{<:Any,<:Any,<:NTuple{2,AbstractBlockedUnitRange{Int,<:AbstractUnitRange{Int}}}}) = bandwidths(A.blocks)
+blockbandwidths(A::BlockedMatrix{<:Any,<:Diagonal,<:NTuple{2,AbstractBlockedUnitRange{Int,<:AbstractUnitRange{Int}}}}) = bandwidths(A.blocks)
+subblockbandwidths(A::BlockedMatrix{<:Any,<:Any,<:NTuple{2,AbstractBlockedUnitRange{Int,<:AbstractUnitRange{Int}}}}) = (0,0)
 
 
 ## BlockVector