diff --git a/lib/internal/quic/core.js b/lib/internal/quic/core.js
index edb1113a2c2964..2df63c2be67cdf 100644
--- a/lib/internal/quic/core.js
+++ b/lib/internal/quic/core.js
@@ -2389,7 +2389,6 @@ class QuicClientSession extends QuicSession {
 
     // If handle is a number, creating the session failed.
     if (typeof handle === 'number') {
-      let reason;
       switch (handle) {
         case ERR_FAILED_TO_CREATE_SESSION:
           throw new ERR_QUIC_FAILED_TO_CREATE_SESSION();
@@ -2398,7 +2397,7 @@ class QuicClientSession extends QuicSession {
         case ERR_INVALID_TLS_SESSION_TICKET:
           throw new ERR_QUIC_INVALID_TLS_SESSION_TICKET();
         default:
-          throw new ERR_OPERATION_FAILED(`Unspecified reason [${reason}]`);
+          throw new ERR_OPERATION_FAILED(`Unspecified reason [${handle}]`);
       }
     }