diff --git a/Sources/SwiftProtobuf/MathUtils.swift b/Sources/SwiftProtobuf/MathUtils.swift
index 4c3d3d7f7..f93d89572 100644
--- a/Sources/SwiftProtobuf/MathUtils.swift
+++ b/Sources/SwiftProtobuf/MathUtils.swift
@@ -42,8 +42,7 @@ internal func div<T : SignedInteger>(_ a: T, _ b: T) -> T {
 #if !swift(>=4.0)
 //
 // Swift 3 called this initializer "truncatingBitPattern";
-// Swift 4 (prerelease) changed this initializer to
-// "truncatingIfNeeded".
+// Swift 4 changed this initializer to "truncatingIfNeeded".
 //
 extension UInt8 {
      internal init(truncatingIfNeeded value: UInt32) {