diff --git a/interfaces/ets/ani/i18n/ets/@ohos.i18n.ets b/interfaces/ets/ani/i18n/ets/@ohos.i18n.ets
index 38bcb2756748059b8e25039121ef49b486017944..68f7d763aec8bc9b4394aae7a300e196af0feba8 100644
--- a/interfaces/ets/ani/i18n/ets/@ohos.i18n.ets
+++ b/interfaces/ets/ani/i18n/ets/@ohos.i18n.ets
@@ -43,7 +43,7 @@ namespace i18n {
     export class Unicode {
         static { loadLibrary("i18n_ani.z"); }
 
-        native static isRTL(char: string): boolean;
+        native static isRTL(ch: string): boolean;
     }
 
     export class TimeZone {