diff --git a/liuthesis.cls b/liuthesis.cls
index b64595b98f485249dc3ab278accb0a4f54eda1a6..ae7978a58616d51f8cd7cb6cf60e84230dee5ea9 100644
--- a/liuthesis.cls
+++ b/liuthesis.cls
@@ -817,6 +817,7 @@
   \fi
 \fi
   \newpage
+  \phantomsection
   \vspace*{6mm}
   { \setlength{\parindent}{0mm}
     \setlength\parskip{8pt}\centerline{ABSTRACT}