diff -Nru iftop-1.0~pre2/debian/rules iftop-1.0~pre2/debian/rules
--- iftop-1.0~pre2/debian/rules	2012-07-15 10:58:25.000000000 +0200
+++ iftop-1.0~pre2/debian/rules	2012-07-14 22:58:17.000000000 +0200
@@ -8,8 +8,8 @@
 	dh ${@}
 
 override_dh_auto_clean:
-	dh_auto_clean config/config.guess config/config.sub
-
+	rm -f config/config.guess config/config.sub
+	dh_auto_clean
 
 override_dh_auto_configure:
 	[ -r /usr/share/misc/config.guess ] && cp -f /usr/share/misc/config.guess config/config.guess