1 files changed, 1 insertions, 0 deletions
diff --git a/index.xml b/index.xml
index c9e50c312..e83095f20 100644
--- a/index.xml
+++ b/index.xml
@@ -177,6 +177,7 @@
 <!ENTITY c5-mawk-inst SYSTEM "chapter5/mawk-inst.xml">
 <!ENTITY c5-patch SYSTEM "chapter5/patch.xml">
 <!ENTITY c5-patch-inst SYSTEM "chapter5/patch-inst.xml">
+<!ENTITY c5-patch-exp SYSTEM "chapter5/patch-exp.xml">
 <!ENTITY c5-sed SYSTEM "chapter5/sed.xml">
 <!ENTITY c5-sed-inst SYSTEM "chapter5/sed-inst.xml">
 <!ENTITY c5-shellutils SYSTEM "chapter5/shellutils.xml">