diff --git a/example/algorithm.tex b/example/algorithm.tex
index 82a4fd9..93d60d6 100644
--- a/example/algorithm.tex
+++ b/example/algorithm.tex
@@ -1,6 +1,7 @@
 \documentclass{../gdutthesis}
 
 \usepackage[algochapter]{algorithm2e}
+\renewcommand{\thealgocf}{\thechapter-\arabic{algocf}}
 \renewcommand{\algorithmcfname}{算法}
 
 \usepackage{glossaries}