diff --git a/handlers/EventSigning.jsx b/handlers/EventSigning.jsx
index f1fc7a5..8dc3916 100644
--- a/handlers/EventSigning.jsx
+++ b/handlers/EventSigning.jsx
@@ -24,6 +24,8 @@ export default function EventSigning({value}) {
     [privateKeyIsValid]
   )
   let signature = useComputedState(async () => {
+    if (evt.sig) return null
+
     try {
       evt.pubkey = publicKey
       return await signEvent(evt, privateKey)