diff --git a/core/object/worker_thread_pool.cpp b/core/object/worker_thread_pool.cpp
index efd8c6968013..56b9fa847567 100644
--- a/core/object/worker_thread_pool.cpp
+++ b/core/object/worker_thread_pool.cpp
@@ -83,7 +83,9 @@ void WorkerThreadPool::_process_task(Task *p_task) {
 	}
 #endif
 
+#ifdef THREADS_ENABLED
 	bool low_priority = p_task->low_priority;
+#endif
 
 	if (p_task->group) {
 		// Handling a group