--- doc/Makefile.am.orig	2008-10-18 09:03:48.000000000 +0200
+++ doc/Makefile.am	2008-10-18 09:05:16.000000000 +0200
@@ -1,7 +1,7 @@
 SUBDIRS = html
 
 man3dir = $(DESTDIR)$(mandir)/man3
-docdir  = $(prefix)/doc/@PACKAGE_TARNAME@-@PACKAGE_VERSION@
+docdir  = $(DESTDIR)/$(datarootdir)/doc/@PACKAGE_TARNAME@-@PACKAGE_VERSION@
 
 EXTRA_DIST = \
 	mainPage.txt