diff --git a/README.md b/README.md
index 78ef0b7..29768d2 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@
   - ã：a6
   - ā：a7
   - a̍：a8
-  - a̋：a9
+  - ă：a9
 
 **注意：調號在添加調符的母音後就要立刻添加，如tia5u，而非tiau5。**
 ### 葫蘆點o͘