diff --git a/docs/installation/clients/sfi.md b/docs/installation/clients/sfi.md
index 8bec5e3a..0247fa41 100644
--- a/docs/installation/clients/sfi.md
+++ b/docs/installation/clients/sfi.md
@@ -13,7 +13,7 @@ Experimental iOS client for sing-box.
 
 #### Note
 
-* User Agent in remote profile request is `SFA/$version ($version_code; sing-box $sing_box_version)`
+* User Agent in remote profile request is `SFI/$version ($version_code; sing-box $sing_box_version)`
 * Crash logs is located in `Settings` -> `View Service Log`
 
 #### Privacy policy