--- src/arpsend.c.original      2021-04-02 18:21:52.000000000 +0000
+++ src/arpsend.c       2021-04-11 16:38:39.006459963 +0000
@@ -214,7 +214,7 @@
 
                        /* we were able to determine my_eaddr and my_eaddr for this interface */
 
-                       if ((sender_protocol_address.s_addr == my_ipaddr.s_addr) && bcmp(&sender_hardware_address, my_eaddr, sizeof(my_eaddr))) {
+                       if ((sender_protocol_address.s_addr == my_ipaddr.s_addr) && bcmp(&sender_hardware_address, my_eaddr, sizeof(*my_eaddr))) {
                                if (danger_found) /* this is not our first warning */
                                        fprintf(stdout, "\n");
                                fprintf(stdout, "*** Warning: sender_protocol_address '%s' is my IP address, but\nsender_hardware_address '%s' ",