diff -aruN a/lib/Makefile.in b/lib/Makefile.in
--- a/lib/Makefile.in	2010-10-13 07:50:57.000000000 -0700
+++ b/lib/Makefile.in	2010-11-15 15:57:54.885153794 -0800
@@ -254,7 +254,7 @@
 top_build_prefix = @top_build_prefix@
 top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
-AM_CPPFLAGS = -Wall -I${top_srcdir}/include -I${top_builddir}/include -D_GNU_SOURCE -DSYSCONFDIR=\"$(sysconfdir)/libnl\"
+AM_CPPFLAGS = -Wall -I${top_srcdir}/include -I${top_builddir}/include -I${builddir}/route -D_GNU_SOURCE -DSYSCONFDIR=\"$(sysconfdir)/libnl\"
 lib_LTLIBRARIES = \
 	libnl.la libnl-genl.la libnl-route.la libnl-nf.la