diff --git a/configure.in b/configure.in
index c3673063..54240758 100644
--- a/configure.in
+++ b/configure.in
@@ -22,10 +22,16 @@ LDFLAGS="${LDFLAGS} -lz"
 
 AC_CHECK_LIB(z,compress,LDFLAGS="$LDFLAGS -lz",echo "Must have zlib";exit)
 
-AC_ARG_ENABLE(debug,Enable debugging features,CPPFLAGS="${CPPFLAGS} -Wall")
-AC_ARG_ENABLE(debug-memory,Enable mem leak debugging,CPPFLAGS="${CPPFLAGS} -DDEBUG_MEMORY")
-AC_ARG_ENABLE(efence,Enable electric fence,LDFLAGS="${LDFLAGS} -lefence")
-AC_ARG_ENABLE(new-howl,[  --enable-new-howl  Use howl 0.9.2 or later],
+AC_ARG_ENABLE(debug,[  --enable-debug          Enable debugging features],
+		       CPPFLAGS="${CPPFLAGS} -Wall")
+AC_ARG_ENABLE(debug-memory,[  --enable-debug-memory   Enable mem leak debugging],
+			      CPPFLAGS="${CPPFLAGS} -DDEBUG_MEMORY")
+AC_ARG_ENABLE(efence,[  --enable-efence         Enable electric fence],
+			LDFLAGS="${LDFLAGS} -lefence")
+AC_ARG_ENABLE(nslu2,[  --enable-nslu2          Build for NSLU2/uNSLUng], 
+		       CFLAGS="${CFLAGS} -DNSLU2")
+
+AC_ARG_ENABLE(new-howl,[  --enable-new-howl       Use howl 0.9.2 or later],
 		      [ case "${enableval}" in
                         yes) rend_howl=true; LDFLAGS="${LDFLAGS} -lhowl";
 			CPPFLAGS="${CPPFLAGS} -DWITH_HOWL";;
@@ -33,7 +39,7 @@ AC_ARG_ENABLE(new-howl,[  --enable-new-howl  Use howl 0.9.2 or later],
 		        *)   AC_MSG_ERROR(bad value ${enableval} for --enable-howl);;
 		      esac ],[rend_howl=false])
 
-AC_ARG_ENABLE(howl,[  --enable-howl      Use the howl mDNS library],
+AC_ARG_ENABLE(howl,[  --enable-howl           Use the howl mDNS library],
 		      [ case "${enableval}" in
                         yes) rend_howl=true; LDFLAGS="${LDFLAGS} -lrendezvous -lcorby -lsalt";
 			CPPFLAGS="${CPPFLAGS} -DWITH_HOWL";;