diff --git a/src/libs/thorvg/tvgTaskScheduler.h b/src/libs/thorvg/tvgTaskScheduler.h
index f4caa1c329..5fc2c06296 100644
--- a/src/libs/thorvg/tvgTaskScheduler.h
+++ b/src/libs/thorvg/tvgTaskScheduler.h
@@ -26,19 +26,23 @@
 #ifndef _TVG_TASK_SCHEDULER_H_
 #define _TVG_TASK_SCHEDULER_H_
 
+#ifdef THORVG_THREAD_SUPPORT
 #include <mutex>
 #include <condition_variable>
 #include <thread>
+#endif
 
 #include "tvgCommon.h"
 #include "tvgInlist.h"
 
+#ifdef THORVG_THREAD_SUPPORT
 using std::mutex;
 using std::condition_variable;
 using std::unique_lock;
 using std::thread;
 using std::atomic;
 using std::try_to_lock;
+#endif
 
 namespace tvg {