diff --git a/configure.in b/configure.in
index 4730d3c..7f1d2af 100644
--- a/configure.in
+++ b/configure.in
@@ -179,6 +179,8 @@
 	CPPFLAGS="$CPPFLAGS -I/usr/local/include"
 	LDFLAGS="$LDFLAGS -L/usr/local/lib -L/usr/ucblib"
 	MANTYPE='$(CATMAN)'
+	IPADDR_IN_DISPLAY=yes
+	AC_DEFINE(USE_PIPES)
 	AC_DEFINE(IP_TOS_IS_BROKEN)
 	mansubdir=cat
 	LIBS="$LIBS -lgen -lnsl -lucb"