diff --git a/Manuals/Tcar-ug/Preface.ent b/Manuals/Tcar-ug/Preface.ent
index baf283a..9b60f8b 100644
--- a/Manuals/Tcar-ug/Preface.ent
+++ b/Manuals/Tcar-ug/Preface.ent
@@ -1,4 +1,5 @@
-<!ENTITY preface              SYSTEM "Preface.docbook">
-<!ENTITY preface-history      SYSTEM "Preface/history.docbook">
-<!ENTITY preface-docconvs     SYSTEM "Preface/docconvs.docbook">
-<!ENTITY preface-feedback     SYSTEM "Preface/feedback.docbook">
+<!ENTITY preface                SYSTEM "Preface.docbook">
+<!ENTITY preface-overview       SYSTEM "Preface/overview.docbook">
+<!ENTITY preface-history        SYSTEM "Preface/history.docbook">
+<!ENTITY preface-docconvs       SYSTEM "Preface/docconvs.docbook">
+<!ENTITY preface-feedback       SYSTEM "Preface/feedback.docbook">