1 files changed, 1 insertions, 0 deletions
diff --git a/index.xml b/index.xml
index ece9dd3ff..a246adb35 100644
--- a/index.xml
+++ b/index.xml
@@ -166,6 +166,7 @@
 <!ENTITY c5-make SYSTEM "chapter5/make.xml">
 <!ENTITY c5-make-inst SYSTEM "chapter5/make-inst.xml">
 <!ENTITY c5-mawk SYSTEM "chapter5/mawk.xml">
+<!ENTITY c5-mawk-exp SYSTEM "chapter5/mawk-exp.xml">
 <!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">