diff --git a/Project.toml b/Project.toml
index ac3624d..c4a4bde 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,14 +1,16 @@
 name = "ArrayLayouts"
 uuid = "4c555306-a7a7-4459-81d9-ec55ddd5c99a"
 authors = ["Sheehan Olver <solver@mac.com>"]
-version = "0.4.7"
+version = "0.4.8"
 
 [deps]
+Compat = "34da2185-b29b-5c13-b0c7-acf172513d20"
 FillArrays = "1a297f60-69ca-5386-bcde-b61e274b549b"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 
 [compat]
+Compat = "3.16"
 FillArrays = "0.9.1"
 julia = "1"
 
diff --git a/src/ArrayLayouts.jl b/src/ArrayLayouts.jl
index d569b68..2ba98f1 100644
--- a/src/ArrayLayouts.jl
+++ b/src/ArrayLayouts.jl
@@ -1,5 +1,5 @@
 module ArrayLayouts
-using Base, Base.Broadcast, LinearAlgebra, FillArrays, SparseArrays
+using Base, Base.Broadcast, LinearAlgebra, FillArrays, SparseArrays, Compat
 import LinearAlgebra.BLAS
 
 import Base: AbstractArray, AbstractMatrix, AbstractVector,
@@ -83,10 +83,6 @@ struct ConjPtr{T}
     ptr::Ptr{T}
 end
 
-if VERSION < v"1.5-"
-    unsafe_convert(::Type{Ptr{T}}, A::Adjoint{<:Real}) where T<:Real = unsafe_convert(Ptr{T}, parent(A))
-    unsafe_convert(::Type{Ptr{T}}, A::Transpose) where T = unsafe_convert(Ptr{T}, parent(A))
-end
 
 # work-around issue with complex conjugation of pointer
 unsafe_convert(::Type{Ptr{T}}, Ac::Adjoint{<:Complex}) where T<:Complex = unsafe_convert(ConjPtr{T}, parent(Ac))
diff --git a/test/test_muladd.jl b/test/test_muladd.jl
index 0421547..4388561 100644
--- a/test/test_muladd.jl
+++ b/test/test_muladd.jl
@@ -1,8 +1,15 @@
 using ArrayLayouts, FillArrays, Random, Test
-import ArrayLayouts: DenseColumnMajor, AbstractStridedLayout, AbstractColumnMajor, DiagonalLayout, mul, Mul
+import ArrayLayouts: DenseColumnMajor, AbstractStridedLayout, AbstractColumnMajor, DiagonalLayout, mul, Mul, zero!
 
 Random.seed!(0)
 @testset "Multiplication" begin
+    @testset "zero!" begin
+        for A in (randn(5,5), [randn(5,5),randn(4,4)])
+            zero!(A)
+            @test iszero(A)
+        end
+    end
+
     @testset "Matrix * Vector" begin
         @testset "eltype" begin
             v = MulAdd(1,zeros(Int,2,2), zeros(Float64,2),0,zeros(2))