diff -up net-tools-1.60/ifconfig.c.ifdef-vs-if net-tools-1.60/ifconfig.c
--- net-tools-1.60/ifconfig.c.ifdef-vs-if	2011-01-03 12:23:14.000000000 +0100
+++ net-tools-1.60/ifconfig.c	2011-01-03 12:31:40.000000000 +0100
@@ -51,7 +51,7 @@
 #include <asm/types.h>
 
 
-#ifdef HAVE_HWSLIP
+#if HAVE_HWSLIP
 #include <linux/if_slip.h>
 #endif
 
@@ -784,7 +784,7 @@ int main(int argc, char **argv)
 		continue;
 	    }
 #endif
-#ifdef HAVE_AFINET
+#if HAVE_AFINET
 	    { /* ipv4 address a.b.c.d */
 		unsigned long ip, nm, bc;
 		safe_strncpy(host, *spp, (sizeof host));
@@ -875,7 +875,7 @@ int main(int argc, char **argv)
 		continue;
 	    }
 #endif
-#ifdef HAVE_AFINET
+#if HAVE_AFINET
 	    {
 		/* ipv4 address a.b.c.d */
 		unsigned long ip, nm, bc;
diff -up net-tools-1.60/lib/interface.c.ifdef-vs-if net-tools-1.60/lib/interface.c
--- net-tools-1.60/lib/interface.c.ifdef-vs-if	2011-01-03 12:23:14.000000000 +0100
+++ net-tools-1.60/lib/interface.c	2011-01-03 12:40:57.000000000 +0100
@@ -36,7 +36,7 @@
 #include <neteconet/ec.h>
 #endif
 
-#ifdef HAVE_HWSLIP
+#if HAVE_HWSLIP
 #include <linux/if_slip.h>
 #include <net/if_arp.h>
 #endif
@@ -482,7 +482,7 @@ int if_fetch(struct interface *ife)
     else
 	ife->mtu = ifr.ifr_mtu;
 
-#ifdef HAVE_HWSLIP
+#if HAVE_HWSLIP
     if (ife->type == ARPHRD_SLIP || ife->type == ARPHRD_CSLIP ||
 	ife->type == ARPHRD_SLIP6 || ife->type == ARPHRD_CSLIP6 ||
 	ife->type == ARPHRD_ADAPT) {
@@ -726,8 +726,10 @@ void ife_print_long(struct interface *pt
 
     hf = ptr->type;
 
+#if HAVE_HWSLIP
     if (hf == ARPHRD_CSLIP || hf == ARPHRD_CSLIP6)
 	can_compress = 1;
+#endif
 
     hw = get_hwntype(hf);
     if (hw == NULL)
diff -up net-tools-1.60/lib/net-support.h.ifdef-vs-if net-tools-1.60/lib/net-support.h
--- net-tools-1.60/lib/net-support.h.ifdef-vs-if	2000-10-28 12:59:42.000000000 +0200
+++ net-tools-1.60/lib/net-support.h	2011-01-03 12:33:21.000000000 +0100
@@ -234,7 +234,7 @@ extern char afname[];
 /* this is a 2.0.36 flag from /usr/src/linux/include/linux/route.h */
 #define RTF_NOTCACHED   0x0400          /* this route isn't cached        */
 
-#ifdef HAVE_AFECONET
+#if HAVE_AFECONET
 #ifndef AF_ECONET
 #define AF_ECONET       19      /* Acorn Econet */
 #endif