diff --git a/src/memory.jl b/src/memory.jl
index 35c39497..d558076d 100644
--- a/src/memory.jl
+++ b/src/memory.jl
@@ -11,6 +11,10 @@ struct Memory
     size::UInt
 end
 
+function Memory(data::Vector{UInt8})
+    return Memory(pointer(data), sizeof(data))
+end
+
 @inline function Base.length(mem::Memory)
     return mem.size
 end
diff --git a/test/runtests.jl b/test/runtests.jl
index 91e973fb..38f8d5e4 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -94,7 +94,7 @@ end
     end
 
     data = Vector{UInt8}(b"foobar")
-    GC.@preserve data let mem = TranscodingStreams.Memory(pointer(data), sizeof(data))
+    GC.@preserve data let mem = TranscodingStreams.Memory(data)
         @test mem isa TranscodingStreams.Memory
         @test mem.ptr == pointer(data)
         @test mem.size == sizeof(data)