--- svr-authpubkey.c
+++ svr-authpubkey.c
@@ -318,7 +318,8 @@
 	/* check that we can use the algo */
 	if (have_algo(algo, algolen, sshhostkey) == DROPBEAR_FAILURE) {
 		dropbear_log(LOG_WARNING,
-				"Pubkey auth attempt with unknown algo for '%s' from %s",
+				"Pubkey auth attempt with unknown algo '%.*s' for '%s' from %s",
+				algolen, algo,
 				ses.authstate.pw_name, svr_ses.addrstring);
 		goto out;
 	}