--- configure.ac	2009-07-22 02:50:46.000000000 +0200
+++ configure.ac.oden	2009-09-01 18:26:04.000000000 +0200
@@ -142,6 +142,7 @@
 dnl  checks for libraries
 
 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])