diff --git a/ktransformers/ktransformers_ext/cpu_backend/task_queue.h b/ktransformers/ktransformers_ext/cpu_backend/task_queue.h
index d4e6d8a..a633a40 100644
--- a/ktransformers/ktransformers_ext/cpu_backend/task_queue.h
+++ b/ktransformers/ktransformers_ext/cpu_backend/task_queue.h
@@ -51,7 +51,7 @@ class custom_mutex {
 #ifdef _WIN32
         ReleaseMutex(global_mutex);
 #else
-        global_mutex.lock();
+        global_mutex.unlock();
 #endif
     }
 };
@@ -74,4 +74,4 @@ class TaskQueue {
     std::atomic<bool> sync_flag;
     std::atomic<bool> exit_flag;
 };
-#endif
\ No newline at end of file
+#endif