diff --git a/MsgPack/Encoder.swift b/MsgPack/Encoder.swift
index 5c76007..e05c173 100644
--- a/MsgPack/Encoder.swift
+++ b/MsgPack/Encoder.swift
@@ -46,7 +46,7 @@ extension MsgPack.Serialiser: SingleValueEncodingContainer {
 	}
 	
 	func encodeNil() throws {
-		throw Error.notImplemented
+		storage = .nil
 	}
 	
 	func encode(_ value: Bool) throws {
diff --git a/Playground.playground/Contents.swift b/Playground.playground/Contents.swift
index cbd6840..c140377 100644
--- a/Playground.playground/Contents.swift
+++ b/Playground.playground/Contents.swift
@@ -1,9 +1,17 @@
 //: Playground - noun: a place where people can play
 
 import MsgPack
+import Foundation
 
-var number: UInt16 = 0x0906
+var number: UInt16? = 0x0906
 
-let data = try Encoder().encode(number)
+let encoder = Encoder()
+
+let data = try encoder.encode(number)
 data[1]
 data[2]
+
+number = nil
+
+let data2 = try encoder.encode(number)
+data2[0]