diff --git a/intel.sgml b/intel.sgml
index cc3c9e718..84351879a 100644
--- a/intel.sgml
+++ b/intel.sgml
@@ -264,6 +264,7 @@
 <!ENTITY c6-in-procinfo-inst SYSTEM "intel/chapter6/procinfo-inst.sgml">
 <!ENTITY c6-in-procps SYSTEM "intel/chapter6/procps.sgml">
 <!ENTITY c6-in-procps-inst SYSTEM "intel/chapter6/procps-inst.sgml">
+<!ENTITY c6-in-procps-exp SYSTEM "intel/chapter6/procps-exp.sgml">
 <!ENTITY c6-in-psmisc SYSTEM "intel/chapter6/psmisc.sgml">
 <!ENTITY c6-in-psmisc-inst SYSTEM "intel/chapter6/psmisc-inst.sgml">
 <!ENTITY c6-in-sed SYSTEM "intel/chapter6/sed.sgml">