diff --git a/arp-request.c b/arp-request.c
index 5932d5d..89ccf9b 100644
--- a/arp-request.c
+++ b/arp-request.c
@@ -17,21 +17,6 @@
 #include <sys/types.h>
 #include <unistd.h>
 
-char hexify(int nybble) {
-	assert(0 <= nybble && nybble <= 16);
-	return "0123456789abcdef"[nybble];
-}
-
-void format_mac(const unsigned char binary_address[6], char formatted[18]) {
-	for (size_t i = 0; i < 6; i++) {
-		unsigned char byte = binary_address[i];
-		formatted[3*i] = hexify(byte >> 4);
-		formatted[3*i + 1] = hexify(byte & 0xf);
-		formatted[3*i + 2] = ':';
-	}
-	formatted[17] = '\0';
-}
-
 void drop_privileges(void) {
 	uid_t uid = getuid();
 	gid_t gid = getgid();