diff -up linux-atm-2.5.1/src/arpd/arp.c.ftbfs linux-atm-2.5.1/src/arpd/arp.c
--- linux-atm-2.5.1/src/arpd/arp.c.ftbfs	2007-07-11 11:27:15.000000000 -0400
+++ linux-atm-2.5.1/src/arpd/arp.c	2019-05-02 20:15:45.497338836 -0400
@@ -15,7 +15,6 @@
 #include <sys/types.h>
 #include <sys/socket.h> /* for linux/if_arp.h */
 #include <netinet/in.h> /* for ntohs, etc. */
-#define _LINUX_NETDEVICE_H /* very crude hack for glibc2 */
 #include <linux/types.h>
 #include <linux/if_arp.h>
 #include <linux/if_ether.h>
diff -up linux-atm-2.5.1/src/arpd/itf.c.ftbfs linux-atm-2.5.1/src/arpd/itf.c
--- linux-atm-2.5.1/src/arpd/itf.c.ftbfs	2007-07-11 11:27:15.000000000 -0400
+++ linux-atm-2.5.1/src/arpd/itf.c	2019-05-02 20:19:08.046499027 -0400
@@ -12,7 +12,6 @@
 #include <sys/types.h>
 #include <linux/atmclip.h>
 #include <sys/socket.h>
-#define _LINUX_NETDEVICE_H /* glibc2 */
 #include <linux/types.h>
 #include <linux/if_arp.h>