diff --git a/Sources/TSCBasic/RegEx.swift b/Sources/TSCBasic/RegEx.swift
index 14e8cc8a..86ad3698 100644
--- a/Sources/TSCBasic/RegEx.swift
+++ b/Sources/TSCBasic/RegEx.swift
@@ -12,6 +12,7 @@ import Foundation
 
 /// A helpful wrapper around NSRegularExpression.
 /// - SeeAlso: NSRegularExpression
+@available(*, deprecated, message: "Use Swift `Regex` type instead")
 public struct RegEx {
     private let regex: NSRegularExpression
     public typealias Options = NSRegularExpression.Options