diff -r 2d87758e836b config/docbook.m4
--- a/config/docbook.m4	Sun Nov 22 22:06:30 2009 +0000
+++ b/config/docbook.m4	Wed Nov 25 21:27:09 2009 +0100
@@ -93,7 +93,7 @@
 [AC_REQUIRE([PGAC_PATH_DOCBOOK_STYLESHEETS])dnl
 if test -n "$DOCBOOKSTYLE"; then
   AC_PATH_PROGS(COLLATEINDEX, collateindex.pl, [],
-                [$DOCBOOKSTYLE/bin $PATH])
+                [$DOCBOOKSTYLE/bin $DOCBOOKSTYLE/.. $PATH])
 else
   AC_PATH_PROGS(COLLATEINDEX, collateindex.pl)
 fi])# PGAC_PATH_COLLATEINDEX