diff --git a/reactos/include/reactos/wmiioctl.h b/reactos/include/reactos/wmiioctl.h
index 97d4708265a..a7af413f4ae 100644
--- a/reactos/include/reactos/wmiioctl.h
+++ b/reactos/include/reactos/wmiioctl.h
@@ -13,7 +13,7 @@
 #define IOCTL_WMI_24 CTL_CODE(FILE_DEVICE_UNKNOWN, 0x24, METHOD_BUFFERED, FILE_ANY_ACCESS) // 0x220090
 #define IOCTL_WMI_25 CTL_CODE(FILE_DEVICE_UNKNOWN, 0x25, METHOD_BUFFERED, FILE_ANY_ACCESS) // 0x220094
 #define IOCTL_WMI_TRACE_USER_MESSAGE CTL_CODE(FILE_DEVICE_UNKNOWN, 0x28, METHOD_NEITHER, FILE_WRITE_ACCESS) // 0x2280A3
-#define IOCTL_WMI_29 CTL_CODE(FILE_DEVICE_UNKNOWN, 0x29, METHOD_BUFFERED, FILE_ANY_ACCESS) // 0x2200A4
+#define IOCTL_WMI_SET_MARK CTL_CODE(FILE_DEVICE_UNKNOWN, 0x29, METHOD_BUFFERED, FILE_ANY_ACCESS) // 0x2200A4
 #define IOCTL_WMI_2a CTL_CODE(FILE_DEVICE_UNKNOWN, 0x2a, METHOD_BUFFERED, FILE_ANY_ACCESS) // 0x2200A8
 #define IOCTL_WMI_2b CTL_CODE(FILE_DEVICE_UNKNOWN, 0x2b, METHOD_BUFFERED, FILE_ANY_ACCESS) // 0x2200AC
 #define IOCTL_WMI_42 CTL_CODE(FILE_DEVICE_UNKNOWN, 0x42, METHOD_BUFFERED, FILE_READ_ACCESS) // 0x224108