--- units-1.87.orig/units.texinfo
+++ units-1.87/units.texinfo
@@ -12,15 +12,13 @@
 @syncodeindex op cp
 
 @c noman
+
+@dircategory Math
 @ifinfo
-@format
-START-INFO-DIR-ENTRY
+@direntry
 * units: (units).	Units conversion.
-END-INFO-DIR-ENTRY
-@end format
-@end ifinfo
+@end direntry
 
-@ifinfo
 This file documents the @sc{gnu} @code{units} command for unit conversion. 
 This is edition @value{EDITION} for @code{units} Version @value{VERSION}.