diff --git a/Manuals/Tcpi-ug/Configurations.ent b/Manuals/Tcpi-ug/Configurations.ent
index edb3787..159b4ee 100755
--- a/Manuals/Tcpi-ug/Configurations.ent
+++ b/Manuals/Tcpi-ug/Configurations.ent
@@ -1,4 +1,5 @@
-<!ENTITY configurations             SYSTEM "Configurations.docbook">
-<!ENTITY configurations-ppp         SYSTEM "Configurations/Ppp.docbook">
-<!ENTITY configurations-ppp-intro   SYSTEM "Configurations/Ppp/intro.docbook">
-<!ENTITY configurations-ppp-modem   SYSTEM "Configurations/Ppp/modem.docbook">
+<!ENTITY configurations                     SYSTEM "Configurations.docbook">
+<!ENTITY configurations-ppp                 SYSTEM "Configurations/Ppp.docbook">
+<!ENTITY configurations-ppp-intro           SYSTEM "Configurations/Ppp/intro.docbook">
+<!ENTITY configurations-ppp-modem-install   SYSTEM "Configurations/Ppp/modem-install.docbook">
+<!ENTITY configurations-ppp-modem-config    SYSTEM "Configurations/Ppp/modem-config.docbook">