diff --git a/JanitorialQC/Utils/Constants.swift b/JanitorialQC/Utils/Constants.swift
index 3fecf65..4270cd7 100644
--- a/JanitorialQC/Utils/Constants.swift
+++ b/JanitorialQC/Utils/Constants.swift
@@ -109,8 +109,14 @@ nonisolated enum Constants {
         /// May change an issue's status / handler, and start a follow-up.
         /// Matches what the API actually accepts for these actions; the server
         /// remains the authority and additionally enforces facility scope.
+        ///
+        /// Built from `inspectorRoles` (already a Set) rather than from an
+        /// array literal: `[a, b, c].union(...)` does not compile, because the
+        /// literal is typed as Array before `.union` is looked up, and Array
+        /// has no such member — the annotation on the left does not reach back
+        /// into the receiver.
         static let issueActors: Set<String> =
-            [admin, director, projectManager].union(inspectorRoles)
+            inspectorRoles.union([admin, director, projectManager])
 
         static func isInspector(_ role: String) -> Bool {
             inspectorRoles.contains(role)