--- configure.ac.orig	2014-09-24 06:41:44.754444670 -0400
+++ configure.ac	2014-09-24 06:42:07.426443639 -0400
@@ -171,6 +171,7 @@
     ],[
         AC_CHECK_LIB([usb], [usb_get_busses])
     ])
+AC_CHECK_LIB([m], [floor])
 AC_CHECK_LIB([sane], [sane_init])
 AC_CHECK_LIB([rt], [clock_gettime], [HAVE_LIBRT=1])