diff --git a/english/Chapter1-1.md b/english/Chapter1-1.md
index 87acdc0c..12d97594 100644
--- a/english/Chapter1-1.md
+++ b/english/Chapter1-1.md
@@ -295,7 +295,7 @@ plot_metric(history,"loss")
 ![](../data/1-1-Loss曲线.jpg)
 
 ```python
-plot_metric(history,"AUC")
+plot_metric(history,"auc")
 ```
 
 ![](../data/1-1-AUC曲线.jpg)