diff --git a/arkui/window_manager/oh_window.h b/arkui/window_manager/oh_window.h
index 5a127dacc5f65e91fe1b376171a0e23a93862c55..64a849812ddfb923eb22c3cd8e07803357f9fa38 100644
--- a/arkui/window_manager/oh_window.h
+++ b/arkui/window_manager/oh_window.h
@@ -35,6 +35,7 @@
 #define OH_WINDOW_H
 
 #include "stdbool.h"
+#include "stddef.h"
 #include "stdint.h"
 
 #include "oh_window_comm.h"