diff --git a/telefunc/node/server/Abort.ts b/telefunc/node/server/Abort.ts
index b61bc214..6d3e650a 100644
--- a/telefunc/node/server/Abort.ts
+++ b/telefunc/node/server/Abort.ts
@@ -2,7 +2,7 @@ export { Abort }
 export { isAbort }
 
 import { assert, assertUsage, objectAssign } from '../utils'
-const stamp = Symbol('isAbort')
+const stamp = '__telefunc_isAbort'
 
 function isAbort(thing: unknown): thing is ReturnType<typeof Abort> {
   assert(thing !== Abort) // Catched earlier in `executeTelefunction()`
diff --git a/telefunc/node/server/shield.ts b/telefunc/node/server/shield.ts
index 401a71c9..cae55f5c 100644
--- a/telefunc/node/server/shield.ts
+++ b/telefunc/node/server/shield.ts
@@ -5,11 +5,11 @@ export { shieldToHumandReadable }
 
 import { isPlainObject, unique, isCallable, assert, assertUsage } from '../utils'
 
-const shielKey = Symbol('shielKey')
-const isVerifierKey = Symbol('isVerifierKey')
-const isVerifierTupleKey = Symbol('isVerifierTupleKey')
+const shieldKey = '__telefunc_shield'
+const isVerifierKey = '__telefunc_isVerifier'
+const isVerifierTupleKey = '__telefunc_isVerifierTuple'
 
-type ShieldOptions = { __autoGenerated ?: boolean }
+type ShieldOptions = { __autoGenerated?: boolean }
 
 const shield: {
   <
@@ -71,12 +71,12 @@ function isTelefunction(thing: unknown): thing is Telefunction {
 }
 
 function installShield(telefunction: Function, telefunctionShield: any, generated: boolean) {
-  const installedShield = (telefunction as any as Record<any, unknown>)[shielKey as any]
+  const installedShield = (telefunction as any as Record<any, unknown>)[shieldKey as any]
   if (installedShield && generated) {
     // another shield is already installed, so not installing generated shield
-    return;
+    return
   }
-  ;(telefunction as any as Record<any, unknown>)[shielKey as any] = telefunctionShield
+  ;(telefunction as any as Record<any, unknown>)[shieldKey as any] = telefunctionShield
 }
 
 function shieldIsMissing(telefunction: Telefunction): boolean {
@@ -92,7 +92,7 @@ function shieldApply(telefunction: Telefunction, args: unknown[]): true | string
 
 type TelefunctionShield = unknown[] | Verifier
 function getTelefunctionShield(telefunction: Telefunction): TelefunctionShield | null {
-  return (telefunction as any)[shielKey] || null
+  return (telefunction as any)[shieldKey] || null
 }
 
 function shieldToHumandReadable(telefunctionShield: TelefunctionShield): string {