diff --git a/CHANGELOG.md b/CHANGELOG.md
index f2964926a..0541e1c30 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 # master
 *Please add new entries at the top.*
+1. Add `ExpressibleByNilLiteral` constraint to `OptionalProtocol` (#805, kudos to @nkristek)
 
 # 6.4.0
 1. Bump min. deployment target to iOS 9 when using swift packages to silence Xcode 12 warnings. Update Quick & Nibmle to the latest version when using swift packages.
diff --git a/Sources/Optional.swift b/Sources/Optional.swift
index 1e8584c84..d30ba0fcf 100644
--- a/Sources/Optional.swift
+++ b/Sources/Optional.swift
@@ -7,8 +7,8 @@
 //
 
 /// An optional protocol for use in type constraints.
-public protocol OptionalProtocol {
-	/// The type contained in the otpional.
+public protocol OptionalProtocol: ExpressibleByNilLiteral {
+	/// The type contained in the optional.
 	associatedtype Wrapped
 
 	init(reconstructing value: Wrapped?)