diff --git a/Sources/SwiftBuild/ProjectModel/BuildSettings.swift b/Sources/SwiftBuild/ProjectModel/BuildSettings.swift
index edcd8bac..6ca92cc0 100644
--- a/Sources/SwiftBuild/ProjectModel/BuildSettings.swift
+++ b/Sources/SwiftBuild/ProjectModel/BuildSettings.swift
@@ -116,6 +116,7 @@ extension ProjectModel {
         }
 
         public enum MultipleValueSetting: String, CaseIterable, Sendable, Hashable, Codable {
+            case ARCHS
             case EMBED_PACKAGE_RESOURCE_BUNDLE_NAMES
             case FRAMEWORK_SEARCH_PATHS
             case GCC_PREPROCESSOR_DEFINITIONS