diff -ru src.orig/configure.ac src/configure.ac
--- src.orig/configure.ac	2015-08-28 15:43:36.236207535 +0200
+++ src/configure.ac	2015-08-28 15:43:01.419984521 +0200
@@ -557,7 +557,7 @@
 if test $enable_rrd_daemon != no || test $enable_rrd_graph != no; then
 EX_CHECK_ALL(glib-2.0,   glib_check_version,            glib.h,                 glib-2.0,    2.28.7, ftp://ftp.gtk.org/pub/glib/2.28/, "")
 fi
-EX_CHECK_ALL(xml2,       xmlParseFile,                  libxml/parser.h,        libxml-2.0,        2.7.8,  http://xmlsoft.org/downloads.html, /usr/include/libxml2)
+EX_CHECK_ALL(xml2,       xmlParseFile,                  libxml/parser.h,        libxml-2.0,        2.7.8,  http://xmlsoft.org/downloads.html, "")
 
 if test "$EX_CHECK_ALL_ERR" = "YES"; then
   AC_MSG_ERROR([Please fix the library issues listed above and try again.])