diff --git a/src/core/apis/file.ts b/src/core/apis/file.ts
index 81606d3f..d14697d2 100644
--- a/src/core/apis/file.ts
+++ b/src/core/apis/file.ts
@@ -377,7 +377,7 @@ export class NTQQFileApi {
                 online_rkey: false
             };
             try {
-                if (this.core.apis.PacketApi.PacketClient?.isConnected) {
+                if (this.core.apis.PacketApi.packetClient?.isConnected) {
                     if ((!this.packetRkey || this.packetRkey[0].time < Date.now() / 1000)) {
                         this.packetRkey = await this.core.apis.PacketApi.sendRkeyPacket();
                     }