diff --git a/en/device-dev/subsystems/subsys-ota-guide.md b/en/device-dev/subsystems/subsys-ota-guide.md
index dac093e437eede6b62f3dde0776fdab317072841..a32b92340a29c1d2129793c148fc0b8dc91748db 100644
--- a/en/device-dev/subsystems/subsys-ota-guide.md
+++ b/en/device-dev/subsystems/subsys-ota-guide.md
@@ -27,7 +27,7 @@ Over the Air \(OTA\) is a technology that makes it easier for you to remotely up
 ## Constraints<a name="section61232796162135"></a>
 
 -   Only the open-source suites for devices powered by Hi3861, Hi3518E V300, and Hi3516D V300 are supported.
--   Devices developed based on Hi3518E V300 and Hi3516D V300 must support the SD card in the Virtual Festival of Aerobatic Teams \(VFAT\) format.
+-   Devices developed based on Hi3518E V300 and Hi3516D V300 must support the SD card in the Virtual File Allocation Table \(VFAT\) format.
 
     >![](../public_sys-resources/icon-note.gif) **NOTE:** 
     >Generation of update packages can only be performed on the Linux system.