diff --git a/Sources/ArgumentParsing/CommandLine.Arguments.swift b/Sources/ArgumentParsing/CommandLine.Arguments.swift
index 32fdf6d80..99ba527c8 100644
--- a/Sources/ArgumentParsing/CommandLine.Arguments.swift
+++ b/Sources/ArgumentParsing/CommandLine.Arguments.swift
@@ -17,7 +17,7 @@ extension CommandLine
             {
                 guard
                 let string:UnsafeMutablePointer<CChar> = $0,
-                let string:String = .init(validatingUTF8: string)
+                let string:String = .init(validatingCString: string)
                 else
                 {
                     return nil