diff --git a/ch08/8.5/8.5.md b/ch08/8.5/8.5.md
index b4e3a85e..a8276af0 100644
--- a/ch08/8.5/8.5.md
+++ b/ch08/8.5/8.5.md
@@ -123,8 +123,8 @@ y = a + c + e;
     t5 = t4 + f
     x = t5
     t6 = a + c
-    t7 = c + e
-    y = t6 + t7
+    t7 = t6 + e
+    y = t7
     ```
 
 2. optimized statments