--- t1aa.etx	2014-03-31 23:14:29.232681855 +0100
+++ t1aae.etx	2014-03-31 01:03:15.939748681 +0100
@@ -424,6 +424,8 @@
  \ligature{LIG/}{exclam}{germandbls}
  \ligature{LIG/}{parenright}{germandbls}
  \ligature{LIG/}{quoteright}{germandbls}
+ \ligature{LIG}{\lc{I}{i}}{longdblsi}
+ \ligature{LIG}{\lc{l}{l}}{longdblsl}
    \comment{The ligature `long s' `long s'.}
 \endsetslot
 
@@ -755,11 +757,14 @@
    \comment{The ligature `long s' `{t}'.}
 \endsetslot
 
-\setslot{underscore}
-   \comment{The ASCII underline character `\textunderscore', usually
-      set on the baseline.
-      This is included for compatibility with typewriter fonts used
-      for computer listings.}
+% \setslot{underscore}
+%    \comment{The ASCII underline character `\textunderscore', usually
+%       set on the baseline.
+%       This is included for compatibility with typewriter fonts used
+%       for computer listings.}
+% \endsetslot
+\setslot{longdblsi}
+   \comment{The ligature `long s' `long s' `{i}'.}
 \endsetslot
 
 \setslot{quoteleft}
@@ -918,10 +923,13 @@
    \comment{The opening curly brace `\textbraceleft'.}
 \endsetslot
 
-\setslot{bar}
-   \comment{The ASCII vertical bar `\textbar'.
-      This is included for compatibility with typewriter fonts used
-      for computer listings.}
+% \setslot{bar}
+%    \comment{The ASCII vertical bar `\textbar'.
+%       This is included for compatibility with typewriter fonts used
+%       for computer listings.}
+% \endsetslot
+\setslot{longdblsl}
+   \comment{The ligature `long s' `long s' `{l}'.}
 \endsetslot
 
 \setslot{braceright}