diff --git a/Sources/ArgumentParser/CMakeLists.txt b/Sources/ArgumentParser/CMakeLists.txt
index 3f7f80fc6..aa3fc030b 100644
--- a/Sources/ArgumentParser/CMakeLists.txt
+++ b/Sources/ArgumentParser/CMakeLists.txt
@@ -11,6 +11,7 @@ add_library(ArgumentParser
   "Parsable Types/EnumerableFlag.swift"
   "Parsable Types/ExpressibleByArgument.swift"
   "Parsable Types/ParsableArguments.swift"
+  "Parsable Types/ParsableArgumentsValidation.swift"
   "Parsable Types/ParsableCommand.swift"
 
   Parsing/ArgumentDecoder.swift