diff --git a/en/application-dev/device/usb-guidelines.md b/en/application-dev/device/usb-guidelines.md
index 8476e88dc8ea1bf774b70991545dbd1d5f3620fe..e14b8bc1fa4e6755108faa6f9d0636f327bc95e4 100644
--- a/en/application-dev/device/usb-guidelines.md
+++ b/en/application-dev/device/usb-guidelines.md
@@ -8,7 +8,7 @@ In Host mode, you can obtain the list of connected devices, enable or disable th
 
 The USB service provides the following functions: query of USB device list, bulk data transfer, control transfer, and access permission management.
 
-The following table lists the USB APIs currently available. For details, see the  [API Reference](../reference/apis/js-apis-usb.md).
+The following table lists the USB APIs currently available. For details, see the [API Reference](../reference/apis/js-apis-usb.md).
 
 **Table  1**  Open USB APIs