1 files changed, 1 insertions, 0 deletions
diff --git a/index.xml b/index.xml
index 79a70a1a4..3f56a44d5 100644
--- a/index.xml
+++ b/index.xml
@@ -166,6 +166,7 @@
 <!ENTITY c5-grep-inst SYSTEM "chapter5/grep-inst.xml">
 <!ENTITY c5-gzip SYSTEM "chapter5/gzip.xml">
 <!ENTITY c5-gzip-inst SYSTEM "chapter5/gzip-inst.xml">
+<!ENTITY c5-gzip-exp SYSTEM "chapter5/gzip-exp.xml">
 <!ENTITY c5-kernel SYSTEM "chapter5/kernel.xml">
 <!ENTITY c5-kernel-inst SYSTEM "chapter5/kernel-inst.xml">
 <!ENTITY c5-kernel-exp SYSTEM "chapter5/kernel-exp.xml">