diff --git a/pkg/npm/http-api/src/Urbit.ts b/pkg/npm/http-api/src/Urbit.ts
index 9c93156b6..dd4df299a 100644
--- a/pkg/npm/http-api/src/Urbit.ts
+++ b/pkg/npm/http-api/src/Urbit.ts
@@ -94,7 +94,7 @@ export class Urbit {
       credentials: 'include',
       accept: '*',
       headers,
-      signal: this.abort
+      signal: this.abort.signal
     };
   }