diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index d2524e8..013b4cb 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c
@@ -636,7 +636,8 @@
 					      abuf, sizeof(abuf)));
 
 		if (rta_tb[IFA_ADDRESS] == NULL ||
-		    memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]), 4) == 0) {
+		    memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]),
+			   ifa->ifa_family == AF_INET ? 4 : 16) == 0) {
 			fprintf(fp, "/%d ", ifa->ifa_prefixlen);
 		} else {
 			fprintf(fp, " peer %s/%d ",