--- /dev/null
+--- a/src/oping.c
++++ b/src/oping.c
+@@ -1125,7 +1125,7 @@ static int update_graph_prettyping (ping
+ wattron (ctx->window, COLOR_PAIR(color));
+
+ if (has_utf8())
+- mvwprintw (ctx->window, /* y = */ 3, /* x = */ x + 2, symbol);
++ mvwprintw (ctx->window, /* y = */ 3, /* x = */ x + 2, "%s", symbol);
+ else
+ mvwaddch (ctx->window, /* y = */ 3, /* x = */ x + 2, symbolc);
+
+@@ -1223,7 +1223,7 @@ static int update_graph_histogram (ping_
+ mvwaddch (ctx->window, /* y = */ 3, /* x = */ x + 2, ' ');
+ else if (has_utf8 ())
+ mvwprintw (ctx->window, /* y = */ 3, /* x = */ x + 2,
+- hist_symbols_utf8[index]);
++ "%s", hist_symbols_utf8[index]);
+ else
+ mvwaddch (ctx->window, /* y = */ 3, /* x = */ x + 2,
+ hist_symbols_acs[index] | A_ALTCHARSET);
+@@ -1600,8 +1600,7 @@ static void update_host_hook (pingobj_it
+
+ HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
+ data_len, context->host, context->addr,
+- sequence, recv_ttl,
+- format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
++ sequence, recv_ttl);
+ if ((recv_qos != 0) || (opt_send_qos != 0))
+ {
+ HOST_PRINTF ("qos=%s ",