diff --git a/packages/bridge/src/qq-hook-client.ts b/packages/bridge/src/qq-hook-client.ts
index c763eba0..cf34f58f 100644
--- a/packages/bridge/src/qq-hook-client.ts
+++ b/packages/bridge/src/qq-hook-client.ts
@@ -1378,9 +1378,10 @@ export class QqHookClient extends EventEmitter {
                 runtimeLog.debug('Client private-message reporting is available: PID=%d', this.pid);
             } else {
                 runtimeLog.warn(
-                    'Client private-message reporting is unavailable: PID=%d status=%d',
+                    'Client private-message reporting is unavailable: PID=%d status=%d%s',
                     this.pid,
                     frame.status,
+                    frame.value0 === 0n ? '' : ` reason=${frame.value0}`,
                 );
             }
 
diff --git a/packages/bridge/tests/qq-hook-client.test.ts b/packages/bridge/tests/qq-hook-client.test.ts
index 36e35384..b142fc7c 100644
--- a/packages/bridge/tests/qq-hook-client.test.ts
+++ b/packages/bridge/tests/qq-hook-client.test.ts
@@ -218,6 +218,15 @@ describe('QqHookClient client message receipts', () => {
             await client.startRecv(onPacket);
             const socket = sockets.mock.results[0]!.value;
             socket.emit('data', pipeFrame({ op: PipeOp.clientMessageState, status: -1 }));
+            socket.emit(
+                'data',
+                pipeFrame({ op: PipeOp.clientMessageState, status: -1, value0: 42n }),
+            );
+            const warning = 'Client private-message reporting is unavailable: PID=12345 status=-1';
+            expect(entries.map((entry) => entry.message)).toEqual([
+                warning,
+                `${warning} reason=42`,
+            ]);
 
             for (const patch of [
                 { value0: 0n },
@@ -242,7 +251,7 @@ describe('QqHookClient client message receipts', () => {
                 entries.filter(
                     (entry) => entry.scope === 'QQHook.Runtime' && entry.level === 'warn',
                 ),
-            ).toHaveLength(6);
+            ).toHaveLength(7);
             socket.emit(
                 'data',
                 pipeFrame({ op: PipeOp.recvPacket, cmd: 'normal', message: '10001', value0: 44n }),