diff --git a/out/shared/disjoint.js b/out/shared/disjoint.js
index 9fb94ad4f257b95225536eb5fdf20eaf6193b7a6..377af13b28807b1943f14240c1e889c3b16efe94 100644
--- a/out/shared/disjoint.js
+++ b/out/shared/disjoint.js
@@ -48,11 +48,17 @@ export class Disjoint extends Array {
         return result;
     }
     withPrefixKey(key, kind) {
-        return this.map(entry => ({
+        const result = this.map(entry => ({
             ...entry,
             path: [key, ...entry.path],
             optional: entry.optional || kind === "optional"
         }));
+        // Workaround for Static Hermes, which doesn't preserve the Disjoint Array subclass here.
+        // Mirrors the existing invert() guard added for https://github.com/arktypeio/arktype/issues/1027
+        // and covers the same failure mode reported in https://github.com/arktypeio/arktype/issues/1415.
+        if (!(result instanceof Disjoint))
+            return new Disjoint(...result);
+        return result;
     }
     toNeverIfDisjoint() {
         return $ark.intrinsic.never;