diff --git a/ethsock.c b/ethsock.c
index 0e953fc..c62d605 100644
--- a/ethsock.c
+++ b/ethsock.c
@@ -1169,7 +1169,9 @@ static int ethsock_ip_add_del(struct ethsock *sock, uint32_t ipaddr, uint32_t ip
 				}
 			}
 
-			if (row.DadState != IpDadStatePreferred) {
+			if (row.DadState == IpDadStateDeprecated) {
+				fprintf(stderr, "Warning: IP address marked as deprecated.\n");
+			} else if (row.DadState != IpDadStatePreferred) {
 				fprintf(stderr, "Failed to add IP address (state=%d).\n", row.DadState);
 				goto out;
 			}