diff --git a/exercise/ex7-12.txt b/exercise/ex7-12.txt
index bb2cbb0..5334ef4 100644
--- a/exercise/ex7-12.txt
+++ b/exercise/ex7-12.txt
@@ -6,7 +6,7 @@ mofaph@gmail.com
      |------------------+-----------+-----------|
      | 图 7-10 中的符号 |      地址 |        值 |
      |------------------+-----------+-----------|
-     |               15 | 0x80483c8 | 0x804945c |
+     |               15 | 0x80483cb | 0x804945c |
      |------------------+-----------+-----------|
      |               16 | 0x80483d0 | 0x8049458 |
      |------------------+-----------+-----------|