--- libfprint/Makefile.am~	2011-04-08 22:35:37.000000000 +0800
+++ libfprint/Makefile.am	2012-12-08 09:31:19.563385014 +0800
@@ -72,7 +72,7 @@
 
 libfprint_la_CFLAGS = -fvisibility=hidden -I$(srcdir)/nbis/include $(LIBUSB_CFLAGS) $(GLIB_CFLAGS) $(CRYPTO_CFLAGS) $(AM_CFLAGS)
 libfprint_la_LDFLAGS = -version-info @lt_major@:@lt_revision@:@lt_age@
-libfprint_la_LIBADD = -lm $(LIBUSB_LIBS) $(GLIB_LIBS) $(CRYPTO_LIBS)
+libfprint_la_LIBADD = -lm $(LIBUSB_LIBS) $(GLIB_LIBS) $(CRYPTO_LIBS) -lrt
 
 fprint_list_udev_rules_SOURCES = fprint-list-udev-rules.c
 fprint_list_udev_rules_CFLAGS = -fvisibility=hidden -I$(srcdir)/nbis/include $(LIBUSB_CFLAGS) $(GLIB_CFLAGS) $(IMAGEMAGICK_CFLAGS) $(CRYPTO_CFLAGS) $(AM_CFLAGS)