diff --git a/doc/src/manual/interfaces.md b/doc/src/manual/interfaces.md
index 5b529022997ee..db69514a9f0bf 100644
--- a/doc/src/manual/interfaces.md
+++ b/doc/src/manual/interfaces.md
@@ -231,11 +231,11 @@ ourselves, we can officially define it as a subtype of an [`AbstractArray`](@ref
 | `length(A)`                                     | `prod(size(A))`                        | Number of elements                                                                    |
 | `similar(A)`                                    | `similar(A, eltype(A), size(A))`       | Return a mutable array with the same shape and element type                           |
 | `similar(A, ::Type{S})`                         | `similar(A, S, size(A))`               | Return a mutable array with the same shape and the specified element type             |
-| `similar(A, dims::NTuple{Int})`                 | `similar(A, eltype(A), dims)`          | Return a mutable array with the same element type and size *dims*                     |
-| `similar(A, ::Type{S}, dims::NTuple{Int})`      | `Array{S}(undef, dims)`               | Return a mutable array with the specified element type and size                       |
+| `similar(A, dims::Dims)`                        | `similar(A, eltype(A), dims)`          | Return a mutable array with the same element type and size *dims*                     |
+| `similar(A, ::Type{S}, dims::Dims)`             | `Array{S}(undef, dims)`                | Return a mutable array with the specified element type and size                       |
 | **Non-traditional indices**                     | **Default definition**                 | **Brief description**                                                                 |
 | `axes(A)`                                    | `map(OneTo, size(A))`                  | Return the `AbstractUnitRange` of valid indices                                       |
-| `Base.similar(A, ::Type{S}, inds::NTuple{Ind})` | `similar(A, S, Base.to_shape(inds))`   | Return a mutable array with the specified indices `inds` (see below)                  |
+| `Base.similar(A, ::Type{S}, inds)`              | `similar(A, S, Base.to_shape(inds))`   | Return a mutable array with the specified indices `inds` (see below)                  |
 | `Base.similar(T::Union{Type,Function}, inds)`   | `T(Base.to_shape(inds))`               | Return an array similar to `T` with the specified indices `inds` (see below)          |
 
 If a type is defined as a subtype of `AbstractArray`, it inherits a very large set of rich behaviors